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 #253 from bkutil/add_applied_attribute

Add optional crowbar-applied boolean attribute to schema
Merge pull request #250 from dirkmueller/master

Fix allocation issues when a role is set
Adding support for crossdomain middleware: the entry is
multiline string which is the full value for cross_domain_policy key of proxy-server.conf
See http://docs.openstack.org/developer/swift/crossdomain.html
Fix permission & ownership of /etc/rsyslog.d/11-swift.conf

It doesn't need the +x bit, and should be owned by root.
added primitive check for cross_domain_policy value validation
Merge pull request #254 from vuntz/rsyslog-file

Fix permission & ownership of /etc/rsyslog.d/11-swift.conf
Merge pull request #252 from jsuchome/crossdomain_middleware

Adding support for crossdomain middleware
Show a conflict message when ceph-radosgw is already deployed
allow saving conflicting proposal
Merge pull request #255 from jsuchome/conflict_with_ceph

raise a conflict when ceph-radosgw is already deployed