modified uri for searching user on account server

modified uri for searching user on account server

modified uri since the account server specification has been changed.

Change-Id: I25771bca72803fe88a09631611194baf73a28181
Signed-off-by: Jaewook Jung <jw0213.jung@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/14455
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Phil Coval <philippe.coval@osg.samsung.com>
Reviewed-by: Uze Choi <uzchoi@samsung.com>
Reviewed-by: Ashok Babu Channa <ashok.channa@samsung.com>
(cherry picked from commit ef8dbb0fb89274b24159d0258e1daa3fe198b313)
Reviewed-on: https://gerrit.iotivity.org/gerrit/14507
Reviewed-by: Dan Mihai <Daniel.Mihai@microsoft.com>
Reviewed-by: Kevin Kane <kkane@microsoft.com>
Reviewed-by: Greg Zaverucha <gregz@microsoft.com>
Reviewed-by: jihwan seo <jihwan.seo@samsung.com>