sap_swpm: optionally skip setting file permissions

[berndfinger]

This PR supports optionally skipping setting permission and ownership of SAP installation files. It also introduces new role parameters for setting the mode, owner, and group of the software directory, the directory for SAPCAR, and the directory for SWPM, as well as the files within.

Solves issue #663.

[rhmk]

LGTM

[berndfinger]

@Wabri Do you want to have a look and comment/approve this PR?

[Wabri]

Yes, I'll do it!

[berndfinger]

Some background information on the proper permissions:

• Downloading and Extracting the Software Provisioning Manager 2.0 Archive in the Installation of SAP ABAP Systems on UNIX : SAP HANA 2.0 Database - Using Software Provisioning Manager 2.0 guide says about the download directory that it must have at least the permission 755.
• It also mentions that all users must have read permissions for the directory where SWPM is to be extracted.
• The same document mentions that the downloaded files must be extracted with the command sapcar -xvf.
• And in the section Downloading the SAP HANA Database Software, it mentions that each installation media must be extracted to a separate folder and that it must not be in the same folder in which SWPM had been extracted. The same applies to the Database Installation Export and Language Software.
• I found no mention of the required permissions for the SAR files so the permissions after the files have been downloaded with a user with umask 022 (resulting in the permission 0644) should be OK. This umask is mentioned in the same SWPM document, in chapter Installation->Prerequisites for Running Software Provisioning Manager. Unless someone finds another source, let's assume this umask setting is also to be used while downloading the SAP software.

[ja9fuchs]

👍