Update the last checkin date in the consumer update json only

Removed the API call for lastCheckin only
Update now recoginizes the last checkin set on the updating consumer object
Drop the Arch table/model

Expect content.arches to be a String, of
comma seperated arch labels

Add a String arches args to Content()
constructor.

This version doesn't do any filtering yet, so
tests that expect content to be filtered
are failing.
Add utility class for parsing and comparing arches
eradicate model.Arch/ArchCurator
add liquibase to remove Arch and ContentArch tables
update import and candlepin_api for content arches
make json.model.Content return list of arch Strings
remove getParsedArches from models
call Arch.isCompatible with correct args

use PRODUCT_ARCH_ATTR contstant for product arch
attribute name
rename Arch.isCompatable to Arch.contentForConsumer

add unit tests
checkstyle cleanup
use correct arch format for content for specs
Fix bug setting compatible arch content
fix unit test to use correct product for expected
Include arches inherited from product on contents
create content in specs by arch label
checkstyle cleanups
remove config variable stub

If we want to make this a configurable feature, we
can add it back.
heal entire org

Added a new API that will trigger the healing of the all the Consumers in an
Owner. The API returns a list of JobStatuses which the caller can use to check
the status of the of the jobs.

Added coded to handle scheduling multiple jobs based on the return of an array
of JobDetails.
created addMinutes method that adds minutes to current time