Merge branch 'develop-ascraeus' into develop

* develop-ascraeus:
  [ticket/12932] Remove set_datetime_class method from user class
  [ticket/12932] Fix tests and calls to create_datetime
  [ticket/12932] Add method for getting the datetime class and allow overriding

Conflicts:
	phpBB/config/services.yml

phpBB/config/parameters.yml

@@ -0,0 +1,2 @@
+parameters:
+    datetime.class: \phpbb\datetime

phpBB/config/services.yml

@@ -11,6 +11,7 @@ imports:
     - { resource: passwords.yml }
     - { resource: profilefields.yml }
     - { resource: twig.yml }
+    - { resource: parameters.yml }
 
 services:
     acl.permissions:
@@ -350,6 +351,8 @@ services:
 
     user:
         class: phpbb\user
+        arguments:
+            - %datetime.class%
 
     user_loader:
         class: phpbb\user_loader