Remote management modules for OCAPI-based devices. (#5754)

* Remote management modules for OCAPI-based devices.

    Open Composable API (OCAPI) is a REST-based API designed for data center composability. For more information, see https://www.opencompute.org/documents/open-composable-api-for-ocp-2019-06-24-pdf

    This PR introduces ocapi_command and ocapi_info modules.  These are based on the existing redfish_command and redfish_info modules and follow similar patterns.  This initial implementation includes support for the folowing operations:

    - Indicator LED toggling
    - Power state toggling
    - Enclosure reset (reboot)
    - Firmware upload
    - Firmware update
    - Firmware activate
    - Job deletion
    - Job status

    These modules have been tested against Western Digital OpenFlex(tm) Data24 storage enclosures. API reference is at https://documents.westerndigital.com/content/dam/doc-library/en_us/assets/public/western-digital/product/platforms/openflex/reference-architecture-open-composable-api.pdf

* Fix licensing issue for ocapi_utils.py

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* Apply suggestions from code review

Co-authored-by: Felix Fontein <felix@fontein.de>

* Update plugins/module_utils/ocapi_utils.py

Co-authored-by: Felix Fontein <felix@fontein.de>

* Update plugins/modules/ocapi_info.py

Co-authored-by: Felix Fontein <felix@fontein.de>

* Apply suggestions from code review

Co-authored-by: Felix Fontein <felix@fontein.de>

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Use six module for urlparse

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Documentation fixes.

Co-authored-by: Felix Fontein <felix@fontein.de>

* Fix sanity test line too long error.

Co-authored-by: Felix Fontein <felix@fontein.de>

.github/BOTMETA.yml

@@ -828,6 +828,10 @@ files:
     maintainers: shane-walker xcambar
   $modules/nsupdate.py:
     maintainers: nerzhul
+  $modules/ocapi_command.py:
+    maintainers: $team_wdc
+  $modules/ocapi_info.py:
+    maintainers: $team_wdc
   $modules/oci_vcn.py:
     maintainers: $team_oracle rohitChaware
   $modules/odbc.py: