fix compile issues resulting from https://github.com/jclouds/jclouds/pull/1511
adjust Mapped -> SyncToAsync
Merge pull request #51 from jclouds/async-fixes-1.6.x

async fixes (1.6.x)
removed async classes from openstack-glance
Merge pull request #54 from jclouds/unasync-openstack-glance-1.6.x

removed async classes from openstack-glance (1.6.x)
Unasyncs jclouds-labs/openstack-quantum
This is part of the push to remove the async apis in jclouds.
Merge pull request #59 from rackerlabs/unasync-openstack-quantum-1.6

Unasyncs jclouds-labs/openstack-quantum
Removes async classes from openstack-swift
Merge pull request #62 from rackerlabs/unasync-openstack-swift-1.6

Removes async classes from openstack-swift
[maven-release-plugin] prepare release jclouds-labs-1.6.0-rc.4
[maven-release-plugin] prepare for next development iteration