DERBY-1015 patches for review.

[Sunitha Kambhampati]

Last week, I attached two small patches to DERBY-1015, and one of the 
patches solves the case for DERBY-1227. "Define interface between 
network server and engine through Java interfaces". 
http://issues.apache.org/jira/browse/DERBY-1015

Can someone please review these patches.
Thanks much,
Sunitha.