fix(travis): Fix page deploy stage

The skip_cleanup was set to true, so new cleanup should set to false.

Signed-off-by: Gaurav Mishra <mishra.gaurav@siemens.com>

.travis.yml

@@ -197,7 +197,7 @@ jobs:
         - bash utils/deploy-pages.sh
       deploy:
         provider: pages
-        cleanup: true
+        cleanup: false
         token: $GITHUB_TOKEN
         keep_history: false
         local_dir: ./code_docs