ListProposalsForOrgMember is available only to actual mentors.

The underlying problem is that AppEngine and NDB cannot handle
empty lists for IN.() query filter. When mentor_for is the empty
list, a server error is raised.

BUG=https://code.google.com/p/soc/issues/detail?id=2572

Change-Id: Ieff3b68a920a914eeb9a6a14714868020f6a5481
1 file changed