NEXUS-5306: Nexus should lock workdir.
Merge remote-tracking branch 'origin/master' into NEXUS-5306-lock-workdir
NEXUS-5306: Added UT
NEXUS-5306: Really added UT
NEXUS-5306: UT optimize imports
NEXUS-5306: Cleanup in UT
NEXUS-5306: proper cleanup
NEXUS-5306: Javadoc and slight improvements
NEXUS-5306: payload is final
Merge pull request #171 from sonatype/NEXUS-5306-lock-workdir

NEXUS-5306: Nexus should lock workdir.