get rid of Devices cache. it causes issues by ignoring updates and doesn't seem to be necessary any longer.
Merge pull request #148 from apigee/USERGRID-1676

get rid of Devices cache. it causes issues by ignoring updates and doesn...
temporarily ignore scheduler tests until Todd gets a chance to fix it for our build server
Merge branch 'master' of https://github.com/apigee/usergrid-stack into USERGRID-348