Update to ruby-standalone 1.8.0 and move pact details from the POST /pact call to the command line

[bethesque]

Instead of posting the consumer name, provider name, and pact file write mode in the POST /pact call here https://github.com/pact-foundation/pact-js/blob/master/src/dsl/mockService.js#L75, they should now be passed in to the command line service call using --consumer, --provider and --pact-file-write-mode

TODO:

• Ensure pact-node is capable of accepting these fields (update: it needs pact-file-write-mode)
• Add any missing parameters to pact to pass through to pact-node
• Make fields as 'deprecated' in current API
• Update Documentation / Release Notes
• Decommission fields in current API and publish new major version

[mefellows]

Will need to raise this in the upstream pact-node repo as this is where the interaction with the CLI happens.

That being said, I believe we already do that - these fields are (or should/will be) optional - and perhaps we can deprecate them in the next major release.

[mefellows]

Just checked pact-node, it's just missing the pact-file-write-mode

[bethesque]

The consumer name/provider name are still mandatory. It's just that they should be provided in the start up command rather than in the POST /pact.

[mefellows]

cc: @mboudreau I assume this needs to go in pact-node?