Filesystem: refactor, improvements, add tests (#25519)

* filesystem: list used tools

* filesystem: btrfs and reiserfs don't support resizing

* filesystem: list supported filesystems

use formatting functions and 'filesystem' instead of 'file system'

* filesystem: PEP8

* filesystem: remove useless calls to module.boolean

* filesystem: fail when the requested action isn't implemented

* filesystem: resizefs: list supported FS rather than unsupported

* filesystem: refactor

* filesystem: add integration tests

* filesystem: allow to use image file with 'dev' param

* filesystem: test resizefs (ext2/3/4 filesystems only)

* filesystem: Btrfs, handle older version than v0.20-rc1

* filesystem: use loop keyword (integration tests)

* filesystem: new test, check when another filesystem already exists

* filesystem: add myself as a maintainer

* filesystem: fix tests as filters

test/integration/targets/filesystem/tasks/setup.yml

@@ -0,0 +1,45 @@
+- name: install filesystem tools
+  package:
+    name: '{{ item }}'
+    state: present
+  when: ansible_system == 'Linux' or item != 'dosfstools'
+  with_items:
+    - e2fsprogs
+    - xfsprogs
+    - dosfstools
+
+- block:
+  - name: install btrfs progs
+    package:
+      name: btrfs-progs
+      state: present
+    when: ansible_os_family != 'Suse' and not (ansible_distribution == 'Ubuntu' and ansible_distribution_version is version('16.04', '<='))
+
+  - name: install btrfs progs (Ubuntu <= 16.04)
+    package:
+      name: btrfs-tools
+      state: present
+    when: ansible_distribution == 'Ubuntu' and ansible_distribution_version is version('16.04', '<=')
+
+  - name: install btrfs progs (OpenSuse)
+    package:
+      name: '{{ item }}'
+      state: present
+    when: ansible_os_family == 'Suse'
+    with_items:
+      - python-xml
+      - btrfsprogs
+  when: ansible_system == 'Linux'
+
+- command: mke2fs -V
+  register: mke2fs
+
+- set_fact:
+    # mke2fs 1.43.6 (29-Aug-2017)
+    e2fsprogs_version: '{{ mke2fs.stderr_lines[0] | regex_search("[0-9]{1,2}\.[0-9]{1,2}(\.[0-9]{1,2})?") }}'
+
+- set_fact:
+    # http://e2fsprogs.sourceforge.net/e2fsprogs-release.html#1.43
+    # Mke2fs no longer complains if the user tries to create a file system
+    # using the entire block device.
+    force_creation: "{{ e2fsprogs_version is version('1.43', '<') }}"