Add ext4 file system command to initialize a new partition

defaults/main.yml

@@ -31,3 +31,4 @@ letsencrypt_pause_services:
 
 fstype_convert:
   btrfs: 'btrfs-convert --no-progress {{ item.src }}'
+  ext4: 'mkfs.ext4 {{ item.src }}'

tasks/mountpoints.yml

@@ -7,7 +7,7 @@
 
 - name: "Convert File System Type"
   shell: '{{ fstype_convert[item.fstype] }}'
-  when: item.fstype != fstype
+  when: item.fstype != fstype.stdout
   ignore_errors: True
 
 - name: "Ensure directory for mountpoint"