Adding service call for requesting a pause

CMakeLists.txt

@@ -59,6 +59,7 @@ add_service_files(
   TSTExecutorExpand.srv
   TSTExecutorIsDelegationExpandable.srv
   TSTExecutorGetConstraints.srv
+  TSTExecutorRequestPause.srv
   TSTStartExecutor.srv
 )
 

srv/TSTExecutorRequestPause.srv

+#
+# Request a pause.
+#
+
+string ns       # Namespace for the tstfactory
+int32 id        # id for the TST node in the tstfactory
+---
+bool request_ok	# Returns true if the request was accepted.
+bool success
+int32 error
+string reason