core: Remove root exclude-filters.xml

Removed the exclude-filters.xml file placed in the root directory. This
file is not referenced in any pom.xml file and the exclusion filter it
contains is stated in the correct module,
frontend/webadmin/modules/uicompat/exclude-filters.xml.

Change-Id: I489b4974dbe35af76a59c44fe034476912339450
Signed-off-by: Allon Mureinik <amureini@redhat.com>
core: findbugs: Remove unneeded bll  exclusions

Removed exclusions for FindBugs warnings that were already fixed.

Change-Id: I55eb9bc3640ecda8a039b52ede6fde76e92ac8d4
Signed-off-by: Allon Mureinik <amureini@redhat.com>
core: findbugs: Remove unneeded utils exclusions

Removed exclusions for FindBugs warnings that were already fixed.

Change-Id: Ie2f4f50ed160dab0ac92d7f97d22b9e406359102
Signed-off-by: Allon Mureinik <amureini@redhat.com>
restapi: findbugs: Remove unneeded exclusions

Removed exclusions for FindBugs warnings that were already fixed.

Change-Id: I480b9f2ddce1a4ccc6d4d887c470895ef0da5bb3
Signed-off-by: Allon Mureinik <amureini@redhat.com>