Append /api/v3/ to request when using GHE
Append /api/v3/ to request when using GHE

Git Hub Enterprise requests should always include /api/v3 in the URL
in order to hit the correct API endpoint. The ci-status and release
commands were producing the wrong request URL. As result, an LDAP
authentication page was returned rather than the expected JSON. A
parsing error could be seen: "invalid character '<' looking for beginning
of value".

This commit changes the construction of the request URL for the
ci-status and release commands, making sure the existing client.requestURL
function is called. This makes sure the API request hits always hits the
right endpoint in Git Hub Enterprise.

Fix #1100

cpick/hub,cpick/hub,cpick/hub