/doc/sphinx/arm/hooks-subnet-cmds.rst
Updated doc to include shared-network-name in returns
/src/hooks/dhcp/subnet_cmds/subnet_cmds.cc
subnetToElement() - now optionally inserts the shared network name
/src/hooks/dhcp/subnet_cmds/tests/subnet4_cmds_unittest.cc
/src/hooks/dhcp/subnet_cmds/tests/subnet6_cmds_unittest.cc
/src/hooks/dhcp/subnet_cmds/tests/subnet6_cmds_unittest.cc
updated tests
added change log entry