packaging: spec: always pull in websocket-proxy

Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1000049
Change-Id: Ie57a0a18a8aa4d2fb7507a1983c7ed2c8bad7d10
Signed-off-by: Alon Bar-Lev <alonbl@redhat.com>