[REF] LocationType - Set defaults, modernize form and BAO

[colemanw]

Overview

Updates the LocationType schema/BAO/form to follow current standards.

Before

No field defaults, no required fields (it was possible to use the api to create a location type with NULL name!), no hooks called when saving through the BAO.create function... and the form didn't even call BAO.create it just copied the code from it!

After

Sanity.

[civibot]

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[seamuslee001]

@colemanw test fail relates

Cannot execute UPDATE `civicrm_location_type` SET `display_name_en_US` = `name` WHERE `display_name_en_US` IS NULL;, UPDATE `civicrm_location_type` SET `display_name_af_ZA` = `name` WHERE `display_name_af_ZA` IS NULL;, UPDATE `civicrm_location_type` SET `display_name_bg_BG` = `name` WHERE `display_name_bg_BG` IS NULL: DB Error: syntax error

[colemanw]

@seamuslee001 how about adding a MOP label when you drive-by!