working update schedule policy

When schedule policy is updated, its respective entry in scaling_schedule is also updated

Need to add more tests
added more tests
uncommented AUTO-467 tests

and removed disallow_update tests.
Also fixed status code check after successful update
updates after edit
test refactoring - per @cyli

having a method to validate only policy update calls and seperate method to validate update made in
scaling_schedule table
Removing checking of select calls when get_policy is called since that has been seperately tested.
Instead mocking it
Removed AUTO-467 reference
update after edit
updating content after edit
updates after edit
Merge pull request #302 from rackerlabs/schedule_policy_update

AUTO-467: update schedule policy
Double quotes in apiary.txt
Merge branch 'master' of github.com:rackerlabs/otter
Update docbook samples
Fixing some merge weirdness.
merge conflict in sample.
Unstaging unintended edits via commit.
More unstaging unintended edits.
Merge pull request #312 from rackerlabs/constanzeWorking

Constanze working
Merge branch 'master' into update-scheduler-system-tests