Git commits in Moodle 3.7.2 by Marina Glancy

commit ccc7e00cc02f23a0b4e3d1507579ee44a03e8c47
Author: Marina Glancy <marina@moodle.com>
Date:   Wed, 17 Jul 2019 00:33:35 +0800
Tag:    v3.7.2

MDL-66163 mod_forum: Add component to unittest sql queries


commit 909d02196f379eaca78a8c443fdc4d2f2c5b52b5
Author: Marina Glancy <marina@moodle.com>
Date:   Wed, 10 Jul 2019 17:28:26 +0800
Tag:    v3.7.2

MDL-66114 core_calendar: normalise categoryid value


commit 520d73b0d63bdb394cf68f2c923cccf6d0f1eb7e
Author: Marina Glancy <marina@moodle.com>
Date:   Tue, 09 Jul 2019 23:36:07 +0800
Tag:    v3.7.2

MDL-66114 core_calendar: events without category