Use local vars for tests

spec/lib/gitlab/oauth/user_spec.rb

@@ -31,8 +31,8 @@ describe Gitlab::OAuth::User do
 
   describe :create do
     it "should create user from LDAP" do
-      @auth = double(info: info, provider: 'ldap')
-      user = gl_auth.create(@auth)
+      auth = double(info: info, provider: 'ldap')
+      user = gl_auth.create(auth)
 
       user.should be_valid
       user.extern_uid.should == info.uid
@@ -40,8 +40,8 @@ describe Gitlab::OAuth::User do
     end
 
     it "should create user from Omniauth" do
-      @auth = double(info: info, provider: 'twitter')
-      user = gl_auth.create(@auth)
+      auth = double(info: info, provider: 'twitter')
+      user = gl_auth.create(auth)
 
       user.should be_valid
       user.extern_uid.should == info.uid
@@ -49,8 +49,8 @@ describe Gitlab::OAuth::User do
     end
 
     it "should apply defaults to user" do
-      @auth = double(info: info, provider: 'ldap')
-      user = gl_auth.create(@auth)
+      auth = double(info: info, provider: 'ldap')
+      user = gl_auth.create(auth)
 
       user.should be_valid
       user.projects_limit.should == Gitlab.config.gitlab.default_projects_limit