Stop asserting on exclusive locks in fsync since it can now support shared vnode locking on ZFS.
Stop asserting on exclusive locks in fsync since it can now support
shared vnode locking on ZFS.

Reviewed by:	jhb

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