[COOK-2575] add LWRP for setting policies
add policy lwrp usage to README
refactor policy provider & add kitchen test
fix typo
Merge pull request #43 from robertchoi8099/COOK-2575

[COOK-2575] add LWRP for setting policies
make clustering work
revert attributes to default values
add 'pattern' attr to service resource
change 'reset-node' action to :nothing and make it notified by template