sudo user option update for BMC execute command

Change-Id: I2ffa020af369d0d62e4b4ca9b73094eab6a76678
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/lib/bmc_ssh_utils.py b/lib/bmc_ssh_utils.py
index 7f7c23f..fdd376f 100755
--- a/lib/bmc_ssh_utils.py
+++ b/lib/bmc_ssh_utils.py
@@ -66,7 +66,7 @@
     openbmc_user_type = os.environ.get('USER_TYPE', "") or \
         BuiltIn().get_variable_value("${USER_TYPE}", default="")
     if openbmc_user_type == 'sudo':
-        cmd_buf = 'sudo ' + cmd_buf
+        cmd_buf = 'sudo -i ' + cmd_buf
     return grs.execute_ssh_command(cmd_buf, open_connection_args, login_args,
                                    print_out, print_err, ignore_err, fork,
                                    quiet, test_mode, time_out)