Bug 26102: Prevent XSS when To.json is used: authorities/authorities.tt

Bug 26102: Prevent XSS when To.json is used: authorities/authorities.tt

Check that mandatory tags and subfields are correctly required when
editing an authority record.

Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
(cherry picked from commit d9ae296b23d6897070c6bb788387ab39e7da8f09)
Signed-off-by: Victor Grousset/tuxayo <victor@tuxayo.net>
(cherry picked from commit 3cb5340c89f5c609f9154e2f3eb14ba0e195e0f2)

Signed-off-by: Wainui Witika-Park <wainuiwitikapark@catalyst.net.nz>