Use standard dci_* parameter in dci_topic
Use standard dci_* parameter in dci_topic

dci_topic.py was using non standard variable for authentication, rather
than the standard dci_login, dci_password, dci_cs_url.

This commit standardize this module.

Change-Id: Ic067fb094f07a4fd2d8de167325a18b9773c47ab

redhat-cip/dci-ansible,redhat-cip/dci-ansible