[EUCA-4254] Remove backport-util-concurrent usage
Merge branch 'EUCA-4254' of git://github.com/goldmann/eucalyptus into testing

Conflicts:
	clc/modules/cluster-manager/src/main/java/com/eucalyptus/cloud/run/ClusterAllocator.java
	clc/modules/msgs/src/main/java/com/eucalyptus/ws/protocol/BaseQueryBinding.java