LP#1746815: Fix sticky hold url param

LP#1746815: Fix sticky hold url param

Renamed the hold_id url param from "id" to "hid" and prevent it from
sticking in url's where it not needed.

To test
-------
[1] Log in to the public catalog as a patron that has at least
    two hold requests.
[2] Go to the My Account holds tab and edit one of the holds.
[3] Rather than submit a change, click on the holds tab again.
[4] Note that /only/ the hold you were edit displays, and that the
    'id' URL parameter persists as you navigate through the public
    catalog.
[5] Apply the patch and repeat steps 1-3. This time, you should
    see all of the holds.

Signed-off by: Cesar Velez <cesar.velez@equinoxinitiative.org>
Signed-off-by: Michele Morgan <mmorgan@noblenet.org>
Signed-off-by: Galen Charlton <gmc@equinoxinitiative.org>