Make fixes to pass rubocop

Guardfile

@@ -21,4 +21,3 @@ guard 'rspec' do
   watch(%r{^spec/acceptance/(.+)\.feature$})
   watch(%r{^spec/acceptance/steps/(.+)_steps\.rb$})   { |m| Dir[File.join("**/#{m[1]}.feature")][0] || 'spec/acceptance' }
 end
-

lib/gitlab_access_status.rb

@@ -15,6 +15,6 @@ class GitAccessStatus
   end
 
   def to_json
-    {status: @status, message: @message}.to_json
+    { status: @status, message: @message }.to_json
   end
 end

lib/gitlab_post_receive.rb

@@ -67,7 +67,7 @@ class GitlabPostReceive
 
   def update_redis
     queue = "#{config.redis_namespace}:queue:post_receive"
-    msg = JSON.dump({'class' => 'PostReceive', 'args' => [@repo_path, @actor, @changes]})
+    msg = JSON.dump({ 'class' => 'PostReceive', 'args' => [@repo_path, @actor, @changes] })
     if system(*config.redis_command, 'rpush', queue, msg,
               err: '/dev/null', out: '/dev/null')
       return true

lib/gitlab_shell.rb

@@ -91,7 +91,7 @@ class GitlabShell
 
   # This method is not covered by Rspec because it ends the current Ruby process.
   def exec_cmd(*args)
-    Kernel::exec({'PATH' => ENV['PATH'], 'LD_LIBRARY_PATH' => ENV['LD_LIBRARY_PATH'], 'GL_ID' => ENV['GL_ID']}, *args, unsetenv_others: true)
+    Kernel::exec({ 'PATH' => ENV['PATH'], 'LD_LIBRARY_PATH' => ENV['LD_LIBRARY_PATH'], 'GL_ID' => ENV['GL_ID'] }, *args, unsetenv_others: true)
   end
 
   def api