Rename "master" branch to "main" and add the Linux Foundation's Devel…

…oper Certificate of Origin to pull request template (opensearch-project#157)

Replace all reference of "master' branch to "main" 

Add the Linux Foundation's Developer Certificate of Origin to pull request template

.github/PULL_REQUEST_TEMPLATE.md

@@ -3,4 +3,27 @@
 *Description of changes:*
 
 
-By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.
+By making a contribution to this project, I certify that:
+
+(a) The contribution was created in whole or in part by me and I
+have the right to submit it under the open source license
+indicated in the file; or
+
+(b) The contribution is based upon previous work that, to the best
+of my knowledge, is covered under an appropriate open source
+license and I have the right under that license to submit that
+work with modifications, whether created in whole or in part
+by me, under the same open source license (unless I am
+permitted to submit under a different license), as indicated
+in the file; or
+
+(c) The contribution was provided directly to me by some other
+person who certified (a), (b) or (c) and I have not modified
+it.
+
+(d) I understand and agree that this project and the contribution
+are public and that a record of the contribution (including all
+personal information I submit with it, including my sign-off) is
+maintained indefinitely and may be redistributed consistent with
+this project or the open source license(s) involved.
+

.github/workflows/cypress-workflow.yml

@@ -2,7 +2,7 @@ name: E2E Cypress tests
 on:
   push:
     branches:
-      - master
+      - main
 
 jobs:
   tests:

.github/workflows/draft-release-notes-workflow.yml

@@ -3,7 +3,7 @@ name: Release Drafter
 on:
   push:
     branches:
-      - master
+      - main
 
 jobs:
   update_release_draft:

.github/workflows/release-workflow.yml

@@ -1,5 +1,5 @@
 name: Release workflow
-# This workflow is triggered on creating tags to master or an opendistro release branch
+# This workflow is triggered on creating tags to main or an opendistro release branch
 on:
   push:
     tags:

.github/workflows/unit-tests-workflow.yml

@@ -2,7 +2,7 @@ name: Unit tests workflow
 on:
   push:
     branches:
-      - master
+      - main
 
 jobs:
   tests:

CONTRIBUTING.md

@@ -23,7 +23,7 @@ reported the issue. Please try to include as much information as you can. Detail
 ## Contributing via Pull Requests
 Contributions via pull requests are much appreciated. Before sending us a pull request, please ensure that:
 
-1. You are working against the latest source on the *master* branch.
+1. You are working against the latest source on the *main* branch.
 2. You check existing open, and recently merged, pull requests to make sure someone else hasn't addressed the problem already.
 3. You open an issue to discuss any significant work - we would hate for your time to be wasted.
 
@@ -56,6 +56,6 @@ If you discover a potential security issue in this project we ask that you notif
 
 ## Licensing
 
-See the [LICENSE](https://github.com/opendistro-for-elasticsearch/index-management-kibana-plugin/blob/master/LICENSE) file for our project's licensing. We will ask you to confirm the licensing of your contribution.
+See the [LICENSE](https://github.com/opendistro-for-elasticsearch/index-management-kibana-plugin/blob/main/LICENSE) file for our project's licensing. We will ask you to confirm the licensing of your contribution.
 
 We may ask you to sign a [Contributor License Agreement (CLA)](http://en.wikipedia.org/wiki/Contributor_License_Agreement) for larger changes.

README.md

@@ -12,7 +12,7 @@ Please see our [documentation](https://opendistro.github.io/for-elasticsearch-do
 1. Download and install the appropriate [Open Distro for Elasticsearch Index Management plugin](https://github.com/opendistro-for-elasticsearch/index-management).
 1. Download the Kibana source code for the [version specified in package.json](./package.json#L9) you want to set up.
 
-   See the [Kibana contributing guide](https://github.com/elastic/kibana/blob/master/CONTRIBUTING.md#setting-up-your-development-environment) for more instructions on setting up your development environment.
+   See the [Kibana contributing guide](https://github.com/elastic/kibana/blob/main/CONTRIBUTING.md#setting-up-your-development-environment) for more instructions on setting up your development environment.
 
 1. Change your node version to the version specified in `.node-version` inside the Kibana root directory.
 1. cd into the `plugins` directory of the Kibana source code directory.
@@ -67,7 +67,7 @@ If you are running cypress tests with Kibana development server use the `--no-ba
 ## Contributing to Open Distro for Elasticsearch Index Management Kibana
 
 - Refer to [CONTRIBUTING.md](./CONTRIBUTING.md).
-- Since this is a Kibana plugin, it can be useful to review the [Kibana contributing guide](https://github.com/elastic/kibana/blob/master/CONTRIBUTING.md) alongside the documentation around [Kibana plugins](https://www.elastic.co/guide/en/kibana/master/kibana-plugins.html) and [plugin development](https://www.elastic.co/guide/en/kibana/master/external-plugin-development.html).
+- Since this is a Kibana plugin, it can be useful to review the [Kibana contributing guide](https://github.com/elastic/kibana/blob/main/CONTRIBUTING.md) alongside the documentation around [Kibana plugins](https://www.elastic.co/guide/en/kibana/main/kibana-plugins.html) and [plugin development](https://www.elastic.co/guide/en/kibana/master/external-plugin-development.html).
 
 ## Get Started and Contribute!