Revert "Up k8s version"

This reverts commit b389f34571e09317fa49b457e9be668f9e9b9e9d.

Change-Id: I9c365ce6ac41e766af8ddfcd1e57654245cf26cb
Reviewed-on: https://review.gerrithub.io/379643
Reviewed-by: Tatyanka Leontovich <tleontovich@mirantis.com>
Tested-by: Tatyanka Leontovich <tleontovich@mirantis.com>
diff --git a/tcp_tests/settings_oslo.py b/tcp_tests/settings_oslo.py
index 7d31eba..42f5917 100644
--- a/tcp_tests/settings_oslo.py
+++ b/tcp_tests/settings_oslo.py
@@ -252,7 +252,7 @@
            default='sbPfel23ZigJF3Bm'),
     ct.Cfg('kubernetes_docker_package', ct.String(), default=''),
     ct.Cfg('kubernetes_hyperkube_image', ct.String(),
-           default='{}/mirantis/kubernetes/hyperkube-amd64:v1.7.5-2'.format(
+           default='{}/mirantis/kubernetes/hyperkube-amd64:v1.7.3-1'.format(
                settings.DOCKER_REGISTRY)),
     ct.Cfg('kubernetes_calico_image', ct.String(),
            default='{}/mirantis/projectcalico/calico/node:latest'.format(
@@ -292,7 +292,7 @@
            default=False),
     ct.Cfg('k8s_conformance_image', ct.String(),
            default='docker-dev-virtual.docker.mirantis.net/mirantis/'
-                   'kubernetes/k8s-conformance:v1.7.5-2_1504192939316')
+                   'kubernetes/k8s-conformance:v1.7.3-1_1503652362277')
 ]
 
 _group_opts = [