addIP and removeIP added to IPCapability.
Add and remove IPs actions skeleton.
AddIPv4 action and template.
AddIPv4 template fixed and test.
IPv6 action, templates and test.
AddIPCommand.
RemoveIPv4 action, template and tests.
RemoveIPv6 action, template and test.
RemoveIPv4 and RemoveIPv6 capability integration test.
RemoveIP command.
Add additional test for wrong parameters. XML for tests moved.
More tests for IPCapability.
Added NONE_OPERATION to RemoveIPs actions.
Add and remove IP template modified.
Merge pull request #586 from adrian-rosello/feature/add-remove-ip

Feature/add remove ip
Merge branch 'develop' of git://github.com/dana-i2cat/opennaas into feature/refactoring-vrrp

Conflicts:
	itests/router/src/test/java/org/opennaas/itests/router/helpers/ParamCreationHelper.java