[INTERNAL] Infra: support of workspace-maven-plugin (-Dworkspace)
[INTERNAL] Infra: support of workspace-maven-plugin (-Dworkspace)

The usage of the workspace-maven-plugin should be as simple as possible
and therefore the required configuration in profiles should be enabled
by just providing a system property: -Dworkspace on the command line to
hide the complexity of the profile from the developers.

Change-Id: Ia3e2ea2e26c664aa9fd9f4b5bc66871f33d3c53f

cschuff/openui5,olirogers/openui5,SQCLabs/openui5,SAP/openui5,nzamani/openui5,nzamani/openui5,SQCLabs/openui5,SAP/openui5,cschuff/openui5,nzamani/openui5,SQCLabs/openui5,cschuff/openui5,SAP/openui5,SAP/openui5,olirogers/openui5,olirogers/openui5