Adds frozen string to the following:

* spec/bin/**/*.rb
* spec/config/**/*.rb
* spec/controllers/**/*.rb

xref https://gitlab.com/gitlab-org/gitlab-ce/issues/59758

Updates specs to use new rails5 format.

The old format:
`get :show, { some: params }, { some: headers }`

The new format:
`get :show, params: { some: params }, headers: { some: headers }`

This reverts commit 68e40bd4, reversing
changes made to 2d1f823b.

This reverts commit 5e966688, reversing
changes made to b35378a9.

in Profiles::NotificationsController#update