Add Helm formulas

Change-Id: I7dda8522fbedc404a9d387f9e6b517be2ffdd253
diff --git a/salt/master/git.yml b/salt/master/git.yml
index 267bdb1..4562a74 100644
--- a/salt/master/git.yml
+++ b/salt/master/git.yml
@@ -8,6 +8,7 @@
 - system.salt.master.formula.git.saltstack
 - system.salt.master.formula.git.stacklight
 - system.salt.master.formula.git.monitoring
+- system.salt.master.formula.git.helm
 parameters:
   _param:
     salt_master_environment_repository: "https://github.com/salt-formulas"