core: Removed the ResXResourceReader class

Removed the class ResXResourceReader from the compat module, this class
was used to load the audit log messages from the properties file, it was
used only in AuditLogDirector, the logic in the class was improved and moved
to a method inside AuditLogDirector

Change-Id: Iacca292e7e725a8e243ad8fb57e4522ac3e082df
Signed-off-by: Tal Nisan <tnisan@redhat.com>
(cherry picked from commit 2084bd522fe50372d1318a78258014033ae95705)