Skip LE key derivation if BR key is temporary

This change skips the LE LTK derivation in case the BR pairig
is not deticated bonding and neither side has requested MITM.
I.e. OPP file transfer require such bonds. This change resolve
the issue of residual IRK in the resolving list.

Change-Id: Ifc9dfc097564f603a466a5bd9b245c89f1bb82aa