Basic testing of the ops-database recipes.

This creates basic testing of the recipes as well as remove unused code such as
the fedora support and the use of passing attributes to openstack::packages.

Change-Id: Iece19811151fbdfd067e12d3b3163cfb78174e49
Update Chef dependency to Chef 11

Also add dependency on json <= 1.7.7, required by Chef 11.

Resolves problem: Bundler could not find compatible versions for gem
"json" (required for chef and berkshelf).

Partial fix for bug #1183540

Change-Id: I5bf4e008100827bfefd56b142b1ea8d3a027806f
Use strainer to isolate and test individual cookbooks

Included:
- Add strainer gem
- Update test-related gems
- Add Strainer file
- Remove run_tests.bash
- Update .gitignore
- Update README file

Partial fix for bug 1188345

Change-Id: Idf071c9e70a6f04164a66be31b745811375211a4