Fix script execution interval

Issue:
------
initial iteration flag was not reset, causing interval
timer never to come into picture and results in execution
of health check continously without waiting for interval

Fix:
----
reset initial flag after first execution and comment out
if condition to check change of status, to allow using
stdout for identifing pipe close and exit

Closes-Bug: 1533604
Related-Bug: 1530539
Change-Id: Id158b5dfb9a0ff7e2560b5a92f4114d38f839456

src/vnsw/agent/contrail/contrail-vrouter-agent-health-check.py

@@ -36,13 +36,14 @@ def start(self):
             else:
                 self.retries_done = 0
                 # TODO(prabhjot) need to add log for every transaction
-                if self.initial == True or ret != self.ret:
-                    # TODO(prabhjot) currently script uses failure to
-                    # write to stdout as a mechanism to identify parent
-                    # process close and exit, eventually we should
-                    # restore below line to optimize unneccessary message
-                    # exchange on the stdout pipe
-                    # self.initial = False
+                # TODO(prabhjot) currently script uses failure to
+                # write to stdout as a mechanism to identify parent
+                # process close and exit, eventually we should
+                # restore below line to optimize unneccessary message
+                # exchange on the stdout pipe
+                #if self.initial == True or ret != self.ret:
+                if True:
+                    self.initial = False
                     self.ret = ret
                     if self.ret == 0:
                         sys.stdout.write("Success\n")