jsonrpc: Removal of not needed reactors

Json over tcp reactor is not needed at all and proton reactor won't be
released in 3.5.

Change-Id: I2beed9ae4adac94312681f919f9b72a692617d43
Signed-off-by: pkliczewski <piotr.kliczewski@gmail.com>
Reviewed-on: http://gerrit.ovirt.org/28503
Reviewed-by: Dan Kenigsberg <danken@redhat.com>