Changed core Observer logic to incorporate explicit deletions.
Changed core Observer logic to incorporate explicit deletions.

cboling/xos,xmaruto/mcord,wathsalav/xos,open-cloud/xos,xmaruto/mcord,jermowery/xos,opencord/xos,jermowery/xos,zdw/xos,jermowery/xos,opencord/xos,open-cloud/xos,xmaruto/mcord,opencord/xos,wathsalav/xos,cboling/xos,open-cloud/xos,xmaruto/mcord,jermowery/xos,zdw/xos,cboling/xos,zdw/xos,zdw/xos,wathsalav/xos,cboling/xos,cboling/xos,wathsalav/xos