Rhbz1124630 - remove RESTEasy dependency from client

by switching to jersey as JAX-RS implementation, in fedora we could save users 200MB download.

Depend on zanata/zanata-parent#36

Not really depend on this but it's nice to have (especially in preparation for Fedora packaging) zanata/zanata-api#22
The deprecation warning was introduced in https://github.com/zanata/zanata-client/commit/c80dad669e3ccad99ce3b70a29d9bcccb9733639 over 2 years ago, so it should be okay to remove the command now.