Rename pod-params.yml to slave-params.yml to make what file contains explicit

Change-Id: Ic87febed2e9db5572eaf92ec162ac742e0aca3cc
Signed-off-by: Fatih Degirmenci <fatih.degirmenci@ericsson.com>

diff --git a/jjb/opnfv/pod-params.yml b/jjb/opnfv/slave-params.yml
similarity index 100%
rename from jjb/opnfv/pod-params.yml
rename to jjb/opnfv/slave-params.yml