MachineConfig.py: osconfig command fails due to no prompt

For the below combination of MachineConfig the job fails
{"lpar":"cpu=dedicated,vpmem=1,vtpm=1","os":"hugepage=2M"}

as the lparconfig power off and on the lpar and than the
osconfig do not find the prompt ready to run os commands

so with this fix we are waiting for lpar os to boot till
login and closing the console for next osConfig to open
and reset the prompt and continue

Signed-off-by: Abdul Haleem <[email protected]>

testcases/MachineConfig.py

@@ -431,6 +431,8 @@ def LparSetup(self, lpar_config=""):
                     return "Failed to enable Performance Information collection"
 
         self.cv_HMC.poweron_lpar()
+        time.sleep(30)
+        self.cv_SYSTEM.console.close()
         curr_proc_mode = self.cv_HMC.get_proc_mode()
         if proc_mode:
             if proc_mode in curr_proc_mode: