New module for managing volumes in Vexata storage arrays (#49006)

* Initial commit for module to manage Vexata storage volumes + fixes form code review in pr #47091.

* Fix indent errors reported by lint.

* Refactor, implement code review changes

* Moved doc fragment file to new layout

* Added explicit types for all module parameters, updated copyrights + raw string for block text.

lib/ansible/plugins/doc_fragments/vexata.py

@@ -0,0 +1,49 @@
+#
+# Copyright: (c) 2019, Sandeep Kasargod <sandeep@vexata.com>
+# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
+
+
+class ModuleDocFragment(object):
+
+    DOCUMENTATION = r'''
+options:
+    - See respective platform section for more details
+requirements:
+    - See respective platform section for more details
+notes:
+    - Ansible modules are available for Vexata VX100 arrays.
+'''
+
+    # Documentation fragment for Vexata VX100 series
+    VX100 = r'''
+options:
+  array:
+    description:
+      - Vexata VX100 array hostname or IPv4 Address.
+    required: true
+    type: str
+  user:
+    description:
+      - Vexata API user with administrative privileges.
+    required: false
+    type: str
+  password:
+    description:
+      - Vexata API user password.
+    required: false
+    type: str
+  validate_certs:
+    description:
+      - Allows connection when SSL certificates are not valid. Set to C(false) when certificates are not trusted.
+      - If set to C(yes), please make sure Python >= 2.7.9 is installed on the given machine.
+    required: false
+    type: bool
+    default: 'no'
+
+requirements:
+  - Vexata VX100 storage array with VXOS >= v3.5.0 on storage array
+  - vexatapi >= 0.0.1
+  - python >= 2.7
+  - VEXATA_USER and VEXATA_PASSWORD environment variables must be set if
+    user and password arguments are not passed to the module directly.
+'''