Ensure that members is a list

self.properties.get('members') should not be None.  Ensure that
an empty list is returned instead.

Change-Id: I01d191eafebac30ad25505b312ff6e936181bdbf
Closes-Bug: #1255697
Imported Translations from Transifex

Change-Id: Iae4d296728f802cc217d36f12f296cbaa75055c7
Merge "Ensure that members is a list"
Merge "Imported Translations from Transifex"