fixed code to work with python3.7 (#1608)

* fixed code to work with python3.7

* removed trailing whitespaces and re-run ansible-linter

roles/cloud-cloudstack/tasks/main.yml

@@ -1,5 +1,4 @@
 ---
-- block:
 - name: Build python virtual environment
   import_tasks: venv.yml
 
@@ -62,9 +61,3 @@
   environment:
     CLOUDSTACK_CONFIG: "{{ algo_cs_config }}"
     CLOUDSTACK_REGION: "{{ algo_cs_region }}"
-
-      rescue:
-      - debug: var=fail_hint
-        tags: always
-      - fail:
-        tags: always

roles/cloud-cloudstack/tasks/prompts.yml

@@ -51,5 +51,4 @@
           [{{ default_zone }}]
     register: _algo_region
     when: region is undefined
-  environment:
-    PYTHONPATH: "{{ cloudstack_venv }}/lib/python2.7/site-packages/"
+