moving controllers/admin/ {commands, configuration, garage, package_definition, package_repostiories, pipelines_snippets}, controllers/admin/plugins, controllers/admin_controller, required libs & util
adding empty views required for specs to pass
fixing specs
fixing deprecations warnings
moving controllers/admin/ {pipeline_groups, pipelines, materials, stages, jobs, tasks}
adding empty views required for specs to pass
fixing specs
fixing deprecations warnings
moving controllers/admin/tasks specs
adding empty views required for specs to pass
fixing specs
fixing deprecations warnings
add failing specs
Merge pull request #281 from arvindsv/admin_controllers_for_srinivasupadhya

#130 - Move some admin controllers