Bug 7372: Move road types from the roadtype table to the ROADTYPE AV

Currently road types are stored in a specific table in DB. Moreover, an
admin page is present in order to manage them.
This patch proposes to remove this table and this page in favour of a
new authorised value category 'ROADTYPE'.

This patch:
- adds a new AV category 'ROADTYPE' (created from the roadtype table
  content).
- remove the roadtype table.
- remove the .pl and .tt file admin/roadtype
- remove the 2 routines C4::Members::GetRoadTypes and
  C4::Members::GetRoadTypeDetails

Test plan:
1/ Execute the updatedatabase entry and verify existing roadtypes are
now stored in the AV 'ROADTYPE'.
2/ Verify you can add/update a streettype for patrons.
3/ Verify on following pages the streettype is displayed in patron
information (top left):
  circ/circulation.pl
  members/memberentry.pl
  members/moremember.pl
  members/routing-lists.pl

Signed-off-by: Sophie Meynieux <sophie.meynieux@biblibre.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>
Bug 7372: DBRev 3.15.00.018

Signed-off-by: Galen Charlton <gmc@esilibrary.com>
Bug 7372: (follow-up) remove last traces of roadtype table and admin pages

This patch removes the DBIC schema class for the 'roadtype' table
and staff interface templates that are no longer reachable with
the removal of the road type administration page.  It also removes
the creation of the table during installation.

Signed-off-by: Galen Charlton <gmc@esilibrary.com>