added the ability to add a syslog drain url to a service

[#58045734]
cleaning up tests and documentation for adding a syslog drain url
[#58045734]
syslog drain url completed, parameters now optional to create-user-provided-service
[#58045734]

Signed-off-by: Damien Le Berrigaud <damien@pivotallabs.com>
Update UPS supports syslog drain url
[#58045734]

Signed-off-by: Damien Le Berrigaud <damien@pivotallabs.com>
Pass domain object instead of attributes when creating UPS
[Finishes #58045734]

Signed-off-by: Damien Le Berrigaud <damien@pivotallabs.com>