 - Fix several locking problems in unionfs_mount so that it will come    closer to passing DEBUG_VFS_LOCKS.
 - Fix several locking problems in unionfs_mount so that it will come
   closer to passing DEBUG_VFS_LOCKS.

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase