core: fix app_list parameter to 'text'

The type of app_list field in vm_dynamic table is text,
but in the stored procedures it was still varchar, which is wrong.

this patch fix the type in the SP to be text as well.

Change-Id: I4c65a74814e84a331aaa9fa8647c31fcddaf58de
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1103707
Signed-off-by: Omer Frenkel <ofrenkel@redhat.com>