rhbz1124630 - need to override accept header for some clients to work

Very strange. I needed to add accept header to these two resource clients to make it work.
Otherwise the Accept header will be set to "text/html, image/gif, image/jpeg, *" and on the server it will cause an exception at org/jboss/resteasy/plugins/delegates/MediaTypeHeaderDelegate.java:42 which in result returns a 415 unsupported media type. 

I don't need to do this for other clients. I am very confused but this change fixed it.
ProjectResource only had these values in the `@Consumes` annotation: `MediaTypes.APPLICATION_ZANATA_PROJECT_XML,
            MediaTypes.APPLICATION_ZANATA_PROJECT_JSON,
            MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON`

I'm not sure what the implications of `Accept */*` might be, but I think we should be explicit about our expected media types.