JCLOUDS-756. Add support for tags to CloudStack.

Conflicts were due to MoreObjects stuff that has since been resolved
for future commits to master anyway.

Conflicts:
	apis/cloudstack/src/main/java/org/jclouds/cloudstack/domain/IngressRule.java
	apis/cloudstack/src/main/java/org/jclouds/cloudstack/domain/SecurityGroup.java
	apis/cloudstack/src/main/java/org/jclouds/cloudstack/domain/Template.java
JCLOUDS-756 - Adding tags/userMetadata to NodeMetadata transform