If execution of supervisorctl was not successful (exit code > 0),
module silently supress this error and returns changed = false,
which turns to OK task state.
This is very confusing, when supervisorctl needs authentication,
and credentials are not specified in module or are incorrect,
services are not restarted/started/stopped without raising an error.
Add a word boundary \b to the regexp for checking the output of a2{en,dis}mod,
to avoid a false positive for a module that ends with the same text as the
module we're working on.
For example, the previous regexp r'.*spam already enabled' would also match
against 'eggs_spam already enabled'.
Also, get rid of the redundant '.*' from the end of the regexp.
Allow passing the database option to the django_manage module for migrations. This is usefull in situations where multiple databases are used by a django application.