chore - Fix reformatter conflicts between eclipse java formatter and pre commit checks

[angusy29]

Context: When you run mvn package, it uses the Eclipse Java Formatter: https://github.com/aws-cloudformation/cloudformation-cli-java-plugin/blob/master/src/main/resources/com/amazonaws/cloudformation/eclipse-java-formatter.xml#L1

But the pre-commit hook we use has a different set of reformatting rules, which conflict with the Eclipse Java Formatter.

Problem

This means, whenever you run mvn package to build the project, your project gets reformatted via the eclipse formatter, but maven verify step in our build process runs lint checks from the pre-commit hook - these 2 conflict, meaning everytime you build the project with mvn package your project WILL reformat itself.

Description of changes:

This change commits:

• Removes end-of-file-fixer from precommit because it conflicts with https://github.com/aws-cloudformation/cloudformation-cli-java-plugin/blob/master/src/main/resources/com/amazonaws/cloudformation/eclipse-java-formatter.xml#L120, precommit tries to add a new line, and eclipse formatter tries to remove it

• Removes trailing-whitespace from precommit, as precommit tried to remove whitespace at the end, and eclipse java formatter tried to add it

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