Bluetooth: Start outgoing connection with tracking

Enables make outgoing connection with error handling.
Free connection objects maintained in polls are assigned to active
connection by result of lookup on the polls based on input
peer LE address.
Updates shell application to reflect above changes in stack.

Change-Id: Ibc71343c0d122cc78c48bac2ff1e50533369b7d2
Signed-off-by: Arkadiusz Lichwa <arkadiusz.lichwa@tieto.com>
4 files changed