Squashed commit of the following:

commit 88d5cf261a61c22b0db1aaa53e0f556a8491194a
Author: Paula Ardanza Menéndez <paula.ardanza.menendez@umontreal.ca>
Date:   Wed Jun 25 12:15:17 2014 -0400

    MDL-45932 enrol_imsenterprise: Implement Scheduled Task for IMS Enrolment plugin. Modifications after feedback from reviewer.

commit 1c3429787cb05f61ca6ceddc9530851585521cbf
Author: Paula Ardanza Menéndez <paula.ardanza.menendez@umontreal.ca>
Date:   Mon Jun 16 17:03:06 2014 -0400

    MDL-45932 enrol_imsenterprise: Implement Scheduled Task for IMS Enrolment plugin.