[Cleanup] Clean up evoacme and evocheck roles

Don't compare with empty string as an empty string is already false and
a non-empty string is already true.

Name all tasks.

apt/tasks/hold_packages.yml

@@ -4,7 +4,7 @@
   shell: "(dpkg -l {{ item }} 2>/dev/null | grep -q -E '^(i|h)i') && ((apt-mark showhold | grep --quiet {{ item }}) || apt-mark hold {{ item }})"
   register: apt_mark
   changed_when: "item + ' set on hold.' in apt_mark.stdout"
-  failed_when: apt_mark.rc != 0 and not apt_mark.stdout == ''
+  failed_when: apt_mark.rc != 0 and apt_mark.stdout
   loop: "{{ apt_hold_packages }}"
   tags:
     - apt

evoacme/tasks/conf.yml

@@ -1,5 +1,6 @@
 ---
-- ini_file:
+- name: "Configure openssl key generation"
+  ini_file:
     dest: "{{ evoacme_crt_dir }}/openssl.cnf"
     section: 'req'
     option: "{{ item.name }}"

evoacme/tasks/evoacme_hook.yml

@@ -16,4 +16,4 @@
     src: "hooks/{{ hook_name }}"
     dest: "{{ evoacme_hooks_dir }}/{{ hook_name }}"
     mode: "0750"
-  when: _find_hook.stdout == ""
+  when: not _find_hook.stdout

evocheck/tasks/exec.yml

@@ -10,6 +10,6 @@
 
 - debug:
     var: evocheck_run.stdout_lines
-  when: evocheck_run.stdout != ""
+  when: evocheck_run.stdout
   tags:
   - evocheck-exec