AdminUI/App configuration form:
 - Removed link that creates app instance for multitenant apps
 - Removed button that generates instance token

RVD/Packaging form:
 - Remove the "allow user to create instance" checkbox
Github issue #127 Moved external service processing from the interpreter to the step itself.
RESTCOMM-626
Fixed #126. Added variable expansion support in both "one of" and "regex" validation pattern fields.
Fixed #127. The variable state if preserved for module-scoped variables until flow leave module. Applications that relied on the buggy assumption that module-scoped variables still exist in chained modules will be affected.
RESTCOMM-626,RESTCOMM-627 #Resolve-Issue fixed