dci_client.py: add the /api suffix
dci_client.py: add the /api suffix

Change-Id: Idd0282db200f43c418ec1d6fe62f2c1ffafcf9f4

enovance/dci-control-server,redhat-cip/dci-control-server,redhat-cip/dci-control-server,goneri/dci-control-server,goneri/dci-control-server,enovance/dci-control-server,goneri/dci-control-server,goneri/dci-control-server