Close Bug:443 - Implement ImmediateEventExecutor wrapper to config-subsystem.

Change-Id: I7b633407ce186507379c0008408deae3775fd0df
Signed-off-by: Tomas Olvecky <tolvecky@cisco.com>
Merge "Close Bug:443 - Implement ImmediateEventExecutor wrapper to config-subsystem."