Update PowerNVDump.py with review comments

Author: mahi657

testcases/PowerNVDump.py

@@ -170,7 +170,6 @@ def setup_pwdless_auth(self):
             self.c.run_command(
                 "ssh-keygen -q -t rsa -f %s -P ''" % self.rsa_path)
             self.c.run_command("chmod 400 %s" % self.rsa_path)
-                               (self.dump_server_pw, self.rsa_path, self.dump_server_ip))
             self.c.run_command("sshpass -p %s ssh-copy-id -o \"StrictHostKeyChecking no\" -i %s %s@%s" %
                                (self.dump_server_pw, self.rsa_path, self.dump_server_user, self.dump_server_ip))
         except CommandFailed:
@@ -295,10 +294,7 @@ def verify_dump_file(self, boot_type=BootType.NORMAL, dump_place="local"):
         else:
             msg = "Dump directory not created"
             raise OpTestError(msg)
-        if self.dump_server_user != 'root':
-        #cannot delete with normal user since dump dir is owned by root
-            pass
-        else:
+        if self.dump_server_user == 'root':
             self.c.run_command("rm -rf /var/crash/%s; sync" % self.crash_content[0])
 
     def verify_fadump_reg(self):