CIDEVSTC-99: Directory service enhancements for count and skip

M112 - T131 SKIP parameter and total results in DB

M112-T131-A002 Return total results available in DB
M112-T131-A005 Process offset (skip) parameter for pagination
M112-T134-A002 Testing skip/offset parameter, implemented with M112-T131-A005
M112-T134-A002 Testing return count, implemented with M112-T131-A002