Fix issue with pool setup when stratisd is in NoRequests state
Fix issue with pool setup when stratisd is in NoRequests state

The previous permissions for the write_metadata method in stratisd were
too restrictive. It does not make sense to prevent metadata updates in
stratisd's own metadata when IPC actions are the only thing that's
disabled. We simply want to prevent users from accidentally making
things worse but we still trust our own accounting of our internal
state.

stratis-storage/stratisd,stratis-storage/stratisd,stratis-storage/stratisd