disable debops since it breaks with ansible 2.10

.travis.yml

@@ -33,12 +33,13 @@ script:
 matrix:
   include:
     # Debops tests.
+    # NOTE: debops tests turned off for Ansible 2.10: https://github.com/debops/debops/issues/1521
     # 2.10; 3.6 -> 2.7
-    - python: "3.6"
-      env: MODE=debops_common VER=2.10.0
+    # - python: "3.6"
+    #   env: MODE=debops_common VER=2.10.0
     # 2.10; 2.7 -> 2.7
-    - python: "2.7"
-      env: MODE=debops_common VER=2.10.0
+    # - python: "2.7"
+    #   env: MODE=debops_common VER=2.10.0
 
     # Sanity check against vanilla Ansible. One job suffices.
     - python: "2.7"