Modified sample apps for easier and automated testing.

Modified sample apps for easier and automated testing.

This addresses IOT-506.
Presence sample app required keyboard input which was inconvenient for
automated testing. Modified some sleep times and counts to make sample
apps more responsive or run quicker.

Change-Id: I3ea1ae3be8e06986a78d904619c9f8860216848b
Signed-off-by: Mandeep Shetty <mandeep.shetty@intel.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/861
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Mark Tung <mark.y.tung@intel.com>
Reviewed-by: Erich Keane <erich.keane@intel.com>