add delete method to ProfileWebService

Change-Id: I074210d17612f93ec2756c40620fcc5c2ba9b674
Reviewed-on: https://q.tasktop.com/alm/s/c2c-oss/gerrit/107
Tested-by: Hudson
Reviewed-by: Michael Nelson <michael.nelson@tasktop.com>
make delete REST URL consistent with others
Integrating Acegi filter and bridge class to Jenkins authentication
plugin, adding Spring credentials to Acegi context