packaging: spec: updated tools dependencies

Updated iso-uploader and image-uploader version requirements.
Removed log-collector requirement making it optional.

Change-Id: I8036e9d70d5337f79df1602d65a4f7f943fb05c3
Bug-Url: https://bugzilla.redhat.com/1103876
Signed-off-by: Sandro Bonazzola <sbonazzo@redhat.com>