core: rm JobRepository unused methods

Remove various unused update methods from JobRepository and its
implementation.

Change-Id: I0cfb2c69cb81546521ec60b8c02e980dca988efb
Signed-off-by: Allon Mureinik <amureini@redhat.com>
core: rm VmInterfaceManagerTest.createNewNetwork

Removed unused method.

Change-Id: I74d12f9d5968450a1167016c8eb98b76ee7e70e3
Signed-off-by: Allon Mureinik <amureini@redhat.com>
core: AttachNetworkToVdsGroupTest.getNetworkList

Removed unused method.

Change-Id: I90ea9ca806d500e07c88964b5288ffe381f1dcaa
Signed-off-by: Allon Mureinik <amureini@redhat.com>
core: ExternalTrustStoreInitializer.FILE_URL_PREFIX

Remove unused constant.

Change-Id: I8df083543c95d1d89348becffa2f14a83dedc14a
Signed-off-by: Allon Mureinik <amureini@redhat.com>
core: rm unused Quotable interface

Change-Id: Id3ec01d83eb98c5bf35aba5a4ebe4e68adab454c
Signed-off-by: Allon Mureinik <amureini@redhat.com>