Patch helps to overcome login issue.

Sometimes the console via ssh is not connected and Login attempt fails,
This could be due to network issue.Attempting to login for 5 times if
the connection is not established in one go.

Signed-off-by: Abdul Haleem <abdhalee@linux.vnet.ibm.com>

testcases/InstallUpstreamKernel.py

@@ -133,8 +133,11 @@ def is_url(path):
                 self.prompt = self.cv_SYSTEM.util.build_prompt()
                 self.console_thread.console_terminate()
                 con.close()
-                time.sleep(10)
-                raw_pty = self.cv_SYSTEM.console.get_console()
+                for i in range(5):
+                    raw_pty = self.cv_SYSTEM.console.get_console()
+                    time.sleep(10)
+                    if raw_pty.sendline("uname -r")!=0:
+                        break
                 raw_pty.sendline("reboot")
                 raw_pty.expect("login:", timeout=600)
                 raw_pty.close()