Add test-clean for server testing.
Add test-clean for server testing.

Reviewed by Edwin Tang


Former-commit-id: 3cef4148a2f343707f7cd9f76e223b5da97d1ebc
bfg-repo-cleaner-demos/eclipselink.runtime-bfg-strip-big-blobs,bfg-repo-cleaner-demos/eclipselink.runtime-bfg-strip-big-blobs,bfg-repo-cleaner-demos/eclipselink.runtime-bfg-strip-big-blobs