Add optional crowbar-applied boolean attribute to schema

We add a crowbar applied attribute to mark the proposal as applied after
the chef run. This allows the UI to show that the current form of the
proposal has been 'applied' successfully (i.e. chef-client completed the
run w/ success) and that the proposal was not modified after that.

Update the proposal_schema_revision, so we can add the attribute to
schema for ('3rd party') barclamps that currently do not have it.

Refs: crowbar/crowbar#2044 (which adds this attribute to barclamps which
lack it), crowbar/barclamp-crowbar#1068 (which marks the proposals as
applied) and https://bugzilla.novell.com/show_bug.cgi?id=877486
Merge pull request #122 from bkutil/add_applied_attribute

Add optional crowbar-applied boolean attribute to schema
Merge pull request #121 from dirkmueller/master

Use internal_auth for cross-service communication
Switch LBaaS on by default

It also causes the Service provider plugin to be loaded, which
is used by various tempest tests. And it seems people forget
about enabling it before running tempest.