exclude files from the search in the Loader

exclude files from the search in the Loader

New configuration parameter EXCLUDE_MODULES defines module names,
which won't be automatically loaded by LoaderServant. It can be used
to exclude obsolete or abstract modules.

Change-Id: If98b50b1505465bcedcf28fe63421c73a4fe160a
JIRA: VSPERF-118
Signed-off-by: Martin Klozik <martinx.klozik@intel.com>
Reviewed-by: Billy O Mahony <billy.o.mahony@intel.com>
Reviewed-by: Maryam Tahhan <maryam.tahhan@intel.com>
Reviewed-by: Fatih Degirmenci <fatih.degirmenci@ericsson.com>
Reviewed-by: Gene Snider <eugene.snider@huawei.com>
Reviewed-by: Al Morton <acmorton@att.com>
Reviewed-by: Tv Rao <tv.rao@freescale.com>
Reviewed-by: Brian Castelli <brian.castelli@spirent.com>