Added db table for subplugin info

db/install.xml

@@ -14,5 +14,18 @@
         <KEY NAME="courseid_fk" TYPE="unique" FIELDS="courseid" COMMENT="Foreign key on course table"/>
       </KEYS>
     </TABLE>
+    <TABLE NAME="tool_cleanupcourses_subplugin" COMMENT="Subplugins for the cleanup courses">
+      <FIELDS>
+        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" SEQUENCE="true"/>
+        <FIELD NAME="name" TYPE="char" LENGTH="50" NOTNULL="true" SEQUENCE="false" COMMENT="name of the subplugin"/>
+        <FIELD NAME="type" TYPE="char" LENGTH="50" NOTNULL="true" SEQUENCE="false" COMMENT="subplugin type of the subplugin"/>
+        <FIELD NAME="enabled" TYPE="int" LENGTH="1" NOTNULL="true" DEFAULT="0" SEQUENCE="false" COMMENT="tells if the subplugin is enabled"/>
+        <FIELD NAME="followedby" TYPE="int" LENGTH="3" NOTNULL="false" SEQUENCE="false" COMMENT="tells which subplugin follows this one in the cleanup process"/>
+      </FIELDS>
+      <KEYS>
+        <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
+        <KEY NAME="unique subplugin" TYPE="unique" FIELDS="name, type"/>
+      </KEYS>
+    </TABLE>
   </TABLES>
 </XMLDB>
\ No newline at end of file

db/upgrade.php

@@ -26,5 +26,8 @@ defined('MOODLE_INTERNAL') || die();
 
 function xmldb_tool_cleanupcourses_upgrade($oldversion) {
 
+    global $DB;
+    $dbman = $DB->get_manager(); // loads ddl manager and xmldb classes
+
     return true;
 }
\ No newline at end of file

version.php

@@ -23,5 +23,5 @@
 
 defined('MOODLE_INTERNAL') || die;
 
-$plugin->version  = 2017050901;
+$plugin->version  = 2017051003;
 $plugin->component = 'tool_cleanupcourses';