Revert "[FABRIC-358] Config admin bridge keeps the placeholder as is, if resolution fails."

This reverts commit ba5f2bca71b74fb04d6431d832e87826bbdfd5e1.

Conflicts:
	fabric/fabric-zookeeper/src/main/java/org/fusesource/fabric/zookeeper/utils/InterpolationHelper.java
Improve the host regex in the KarafContainerRegistration.java
Upgrade to jclouds 1.5.7. Misc cloud improvements.