Removed usage of support_email everywhere

 * This settings has been removed from gitlab and gitlab cookbook and it's
   a follow-up from foodcritic fixes.

attributes/default.rb

@@ -66,7 +66,6 @@ end
 default['gitlab']['git_path'] = "/usr/local/bin/git"
 default['gitlab']['host'] = "localhost"
 default['gitlab']['email_from'] = "gitlab@localhost"
-default['gitlab']['support_email'] = "support@localhost"
 default['gitlab']['max_size'] = "20971520" # 20.megabytes
 default['gitlab']['git_timeout'] = 10

solo.json.production_example

@@ -3,7 +3,6 @@
     "host": "example.com",
     "url": "http://example.com/",
     "email_from": "gitlab@example.com",
-    "support_email": "support@example.com",
     "database_adapter": "postgresql",
     "database_password": "database password used by the GitLab application",
     "repository": "clone URL for e.g. GitLab Enterprise Edition; omit this line to use Community Edition",

spec/install_spec.rb

@@ -20,7 +20,6 @@ describe "gitlab::install" do
             port: '80',
             user: 'git',
             email_from: 'gitlab@localhost',
-            support_email: 'support@localhost',
             max_size: '20971520',
             git_timeout: 10,
             satellites_path: '/home/git/gitlab-satellites',
@@ -456,7 +455,6 @@ describe "gitlab::install" do
             port: '80',
             user: 'git',
             email_from: 'gitlab@localhost',
-            support_email: 'support@localhost',
             max_size: '20971520',
             git_timeout: 10,
             satellites_path: '/home/git/gitlab-satellites',