Remove ambiguity in stubbed methods in spec_helper

- Adjust the stubs in spec/spec_helper.rb to specify the appropriate
  number of expected variables.

Partial-Bug: #1271535
Change-Id: I34542d8544cf7cefa5caebf4c323879c567a4f20
Clean up cookbook for bp/clean-up-attr-for-mq-and-db

This change removes the attributes we'll be moving to openstack-common
and changes reference of those attributes to reflect new (more
consistent) namespace.

Change-Id: I30e37b4ff6369c19978973a8890ef2122692db44
Implements: blueprint clean-up-attr-for-mq-and-db
Merge "Remove ambiguity in stubbed methods in spec_helper"
Rubocop cleanup - removing individual directory .rubocop.yml files

- Remove directory/.rubocop.yml files
- Adjust Strainerfile to use the single .rubocop.yml
- Adjust .rubocop.yml ot reference all directories

Change-Id: I4323a1d1b626001c0b0dc05bec473b16c637f485
Addresses: blueprint rubocop-for-metering