Ensure 0755 default mode on new directories

This patch ensures that all directories under `/openstack/venvs`
are created with `0755` permissions by default. This prevents
permission denied errors when running certain commands from the
virtual environment.

Change-Id: I6a5fbdd16dd2558341c7e7d647a18b5028471315

tasks/trove_install.yml

@@ -73,6 +73,7 @@
   file:
     path: "{{ trove_bin | dirname }}"
     state: directory
+    mode: "0755"
   register: trove_venv_dir
 
 - name: Unarchive pre-built venv

tasks/trove_pre_install.yml

@@ -39,7 +39,7 @@
     group: "{{ item.group|default(trove_system_group_name) }}"
     mode: "{{ item.mode|default('0755') }}"
   with_items:
-    - { path: "/openstack", owner: "root", group: "root" }
+    - { path: "/openstack/venvs", owner: "root", group: "root" }
     - { path: "/etc/trove" }
     - { path: "{{ trove_system_user_home }}" }
     - { path: "/var/lib/trove/tmp" }