Merge "Stop prefix discovery if an RA prefix arrives in DISCOVERING" into rvc-dev am: 83eb86b247

Change-Id: If85833c1a62b96830cbfeea7bd734190b2d8f1c3
tree: 7f09fe1011a9bd28cfcdef93f1571817171dcbd9
  1. core/
  2. services/
  3. tests/