Fix linter errors

Change-Id: Ie1760e1fb18891d59f355fce6154d183c5c621e6

doc/source/conf.py

@@ -231,7 +231,7 @@ latex_elements = {
 #  author, documentclass [howto, manual, or own class]).
 latex_documents = [
     (master_doc, 'doc-' + target_name + '.tex',
-     title.replace("_", "\_"), author, 'manual'),
+     title.replace("_", r"\_"), author, 'manual'),
 ]
 
 latex_use_xindy = False

tasks/configure_metal_hosts.yml

@@ -62,7 +62,7 @@
     name: "{{ item.name }}"
   with_items: "{{ openstack_host_kernel_modules + openstack_host_specific_kernel_modules }}"
   when:
-    - item.name != ''
+    - item.name | length > 0
     - item.pattern is undefined or (item.pattern is defined and (modules.content | b64decode).find(item.pattern + '=m') != -1)
 
 - name: Write list of modules to load at boot

tests/test.yml

@@ -109,7 +109,7 @@
 
     - name: Check for ssh dir
       stat:
-        path: "{{ ansible_env.HOME}}/.ssh"
+        path: "{{ ansible_env.HOME }}/.ssh"
       register: ssh_dir
 
     - name: Check for extra host package present on host
@@ -143,6 +143,6 @@
           - "systat_file.stat.exists"
           - "'PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin' in environment_content"
           - "ssh_dir.stat.isdir"
-          - extra_distro_package_host.changed == false
-          - extra_metal_distro_package_host.changed == false
+          - extra_distro_package_host is not changed
+          - extra_metal_distro_package_host is not changed