Support for ob deploy pact verification server

[dfordivam]

If you make use of the module.nix in the 'ob deploy' dir it should deploy the pact-server.

The configurable parameters is this file is the location, which is the nginx virtualhost's path, and the imports depending upon whether the deployment happens on EC2 or a virtual machine.

Moreover the config/common/verification-server file should match the location value.

for example if the location is /pact/, then the file would be:

$ cat config/common/route 
http://192.168.11.14

$ cat config/common/verification-server 
http://192.168.11.14/pact