Match group func tests to specification

When a group does not exist, the group resource should raise an exception on action modify,
but not on action_manage.

Also update the `not_to raise_error(SpecificError)` deprecated syntax.
Cleanup commented out code
Merge pull request #2154 from opscode/btm/group_functional_tests

Match group func tests to specification
Remove space before paren (ruby warning)
Add a line for the fix to issue 1563 (broken git shallow-clone).
serverspec 2 fixes to e2e tests

also some cleanup in the os-detection
Merge pull request #2178 from opscode/lcg/serverspec-2

serverspec 2 fixes
Trying to eradicate all traces of the JSON gem from Chef
ffi_yajl still isn't loading, and when I manually installed it on the host I was calling the wrong method
Having busser install ffy-yajl gem so it can use it for serverspec test runs
Updating DOC_CHANGES
Found some JSON pretty printing statements I missed
Fixing some more changes I missed
Fixing failing tests.  The earlier changes I made to this file were caused by missing JSON printers that I left around.  Once I fixed those, the original changes I made to this test were unneeded.
Moving documentation to CHANGELOG since no online documentation needs to update with this
Removing old .to_json monkeypatching for all objects
My local gemset was including the `json` gem, causing these tests to be ineffective.  Also made them more clear
Removing my branch from test kitchen - preparing to merge to master
Updating to latest chef-zero since that dropped json dependencies too
Using my ffi-yajl branch where I fixed Objects that do not support to_json