better handling of checkmode for solaris

fixes #2296

system/user.py

@@ -1352,11 +1352,10 @@ class SunOS(User):
             cmd.append('-s')
             cmd.append(self.shell)
 
-        if self.module.check_mode:
-            return (0, '', '')
-        else:
         # modify the user if cmd will do anything
         if cmd_len != len(cmd):
+            (rc, out, err) = (0, '', '')
+            if not self.module.check_mode:
                 cmd.append(self.name)
                 (rc, out, err) = self.execute_command(cmd)
                 if rc is not None and rc != 0:
@@ -1366,6 +1365,8 @@ class SunOS(User):
 
         # we have to set the password by editing the /etc/shadow file 
         if self.update_password == 'always' and self.password is not None and info[1] != self.password:
+            (rc, out, err) = (0, '', '')
+            if not self.module.check_mode:
                 try:
                     lines = []
                     for line in open(self.SHADOWFILE, 'rb').readlines():