Comment 1 for bug 846129

Also affects other commands:

2011-09-09 23:45:49,582: hook.executor@DEBUG: Running hook: /var/lib/ensemble/units/mysql-4/formula/hooks/shared-db-relation-changed
2011-09-09 23:45:49,743: unit.hook.api@INFO: HOOK: shared-db-relation-changed fired.
2011-09-09 23:45:49,907: unit.hook.api@INFO: mysql - shared-db: Relation CHANGED
2011-09-09 23:45:49,977: hook.output@ERROR: Traceback (most recent call last):
  File "/usr/local/bin/relation-get", line 7, in <module>
    execfile(__file__)
  File "/usr/lib/ensemble/ensemble/bin/relation-get", line 8, in <module>
    from ensemble.hooks.commands import relation_get
ImportError: No module named ensemble.hooks.commands

2011-09-09 23:45:49,980: hook.output@DEBUG: hook shared-db-relation-changed exited, exit code Traceback (most recent call last):
Failure: ensemble.errors.FormulaInvocationError: Error processing '/var/lib/ensemble/units/mysql-4/formula/hooks/shared-db-relation-changed': exit code 1.