change gid_from_name to false to user present

saltstack 2017.7 is failing to create user when default group for user is not present, commit which changes this behavior from 2016.3 is https://github.com/saltstack/salt/commit/a18dbe0c11198143f248f7cb6c1d94e736e6301c

Change-Id: I478d632e8aa7303ab2ee32b033478148c18c473d
diff --git a/linux/system/user.sls b/linux/system/user.sls
index 5e37b5d..4d76454 100644
--- a/linux/system/user.sls
+++ b/linux/system/user.sls
@@ -29,7 +29,7 @@
   - password: {{ user.password }}
   - hash_password: {{ user.get('hash_password', False) }}
   {% endif %}
-  - gid_from_name: true
+  - gid_from_name: false
   {%- if user.groups is defined %}
   - groups: {{ user.groups }}
   {%- endif %}