JCLOUDS-630: Map Payload ContentMetadata expires to Swift X-Delete-At header for object expiration.
Fix Maven parent.relativePath warnings
Swift API region cleanup

Conflicts:
	openstack-swift/src/test/java/org/jclouds/openstack/swift/v1/features/ObjectApiMockTest.java
Strip hardcoded v2.0 in Neutron APIs. Prefer usage of ApiMetadata version string.
Adds support for the Security Group extension to neutron
Review fixes