Bug 38087: Add print template for WELCOME notice at install time

Bug 38087: Add print template for WELCOME notice at install time

This patch adds a default print template for the welcome notice. It will
be installed at install time but will not be added at upgrade time.

It will also be available as the default under the notice templates
tool.

Test plan
1) Apply the patch
2) Under 'Tools > Notices and Slips' select the 'WELCOME' notice to edit
3) Click 'View default' under the 'Print' message transport type
4) Note the new default template is shown
5) Use 'Copy to template' to apply it to the notice
6) Use a user (Henry perhaps under sandboxes) without an email address
   to test the template by
6a) Under 'more' click 'Send welcome notice'
7) Preview the pending print notice under the patrons notices tab by
   clicking the notice title.
8) Confirm the notice looks reasonable and sign off

Signed-off-by: Laura_Escamilla <laura.escamilla@bywatersolutions.com>
Signed-off-by: Baptiste Wojtkowski <baptiste.wojtkowski@biblibre.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>