InstallRhel: Fix setting hostname properly

Currently hostname is set with ip address during rhel OS installation.
This patch fixes it by setting the hostname with dns name properly.
For this user need to suppy host name in --host-name

Fixes: #261

Signed-off-by: Pridhiviraj Paidipeddi <ppaidipe@linux.vnet.ibm.com>

OpTestConfiguration.py

@@ -96,6 +96,7 @@ def get_parser():
                            help="Prompt for Host SSH session")
 
     hostinstgroup = parser.add_argument_group('Host OS Install', 'Options for installing an OS on the Host')
+    hostinstgroup.add_argument("--host-name", help="Host name", default="localhost")
     hostinstgroup.add_argument("--host-gateway", help="Host Gateway", default="")
     hostinstgroup.add_argument("--host-submask", help="Host Subnet Mask", default="255.255.255.0")
     hostinstgroup.add_argument("--host-mac",

testcases/InstallRhel.py

@@ -46,6 +46,8 @@ def setUp(self):
             self.fail("Provide host user details refer, --host-{user,password}")
         if not self.conf.args.host_scratch_disk:
             self.fail("Provide proper host disk to install refer, --host-scratch-disk")
+        if not self.conf.args.host_name:
+            self.fail("Provide hostname to be set during installation")
 
     def runTest(self):
         self.system.goto_state(OpSystemState.PETITBOOT_SHELL)
@@ -84,7 +86,7 @@ def runTest(self):
                                                                                                  self.host.ip,
                                                                                                  self.conf.args.host_gateway,
                                                                                                  self.conf.args.host_submask,
-                                                                                                 self.host.hostname(),
+                                                                                                 self.conf.args.host_name,
                                                                                                  self.conf.args.host_dns,
                                                                                                  ks_url)
             self.c = self.system.sys_get_ipmi_console()