Add purge intentfunction to onos driver
diff --git a/TestON/drivers/common/cli/onosclidriver.py b/TestON/drivers/common/cli/onosclidriver.py
index 87df2fe..9590b26 100644
--- a/TestON/drivers/common/cli/onosclidriver.py
+++ b/TestON/drivers/common/cli/onosclidriver.py
@@ -400,6 +400,14 @@
         self.handle.sendline("cd "+self.home)
         return main.TRUE
         
+    def purge(self):
+        main.log.info("Purging dead intents")
+        self.handle.sendline("cd "+self.home+ "/scripts")
+        self.handle.expect("scripts")
+        print("Purging Intents")
+        self.handle.sendline("./purgeintents.py")
+        self.handle.sendline("cd "+self.home)
+        return main.TRUE