Gorouter manages its own dependenceis

* gorouter was changed to use godep, dependencies are now vendored

Signed-off-by: Kai Zhang <kaizhang@cn.ibm.com>
Bump src/dea_next

Bump cloudfoundry/dea_ng:
  Eric Malm:
     Revert "This changeset adds support of max_instances and available_instances.  Resource manager tracks all registered instances, except those in the DELETED state.  Its could_reserve? and numbers reserverable methods responds positively when the total number of undeleted instances fall under the max_instances limit." ( Travis started: https://travis-ci.org/cloudfoundry/dea_ng/builds/21552915 )
  Abhijit Hiremagalur:
     Inline scripts to run specs in warden-compatible vm ( Travis Success: https://travis-ci.org/cloudfoundry/dea_ng/builds/21548125 )
     Reflect changes in warden-test-infrastructure ( Travis Success: https://travis-ci.org/cloudfoundry/dea_ng/builds/21533298 )
  Chris Adams:
     Merge pull request #85 from jackfengibm/max_instances ( Travis Failed: https://travis-ci.org/cloudfoundry/dea_ng/builds/21467405 )
     Merge pull request #111 from praveend/master ( Travis Failed: https://travis-ci.org/cloudfoundry/dea_ng/builds/21464827 )
  Praveen Devarao:
     Test case for detecting db2 and informix as valid RAILS databases and converting urischeme to ibmdb ( Travis Unknown )
     Test case for detecting db2 and informix as valid RAILS databases and converting urischeme to ibmdb ( Travis Unknown )
     Recognize db2 and informix as valid databases for generation of valid DATABASE_URL ( Travis Unknown )
  Jack Feng:
     This changeset adds support of max_instances and available_instances.  Resource manager tracks all registered instances, except those in the DELETED state.  Its could_reserve? and numbers reserverable methods responds positively when the total number of undeleted instances fall under the max_instances limit. ( Travis Unknown )
Change `update` to handle gorouter submodule switch.

Signed-off-by: Kai Zhang <kaizhang@cn.ibm.com>