ios_facts module will no longer error on missing command (#5491)
ios_facts module will no longer error on missing command (#5491)

The module will error if it tries to use a cli command that is not available
on a given platform.  This fix will address that problem.  If the cli
command is not available, then the command is silently discarded and the
facts that the command output is based on is not returned.  Any failed
commands are provided in the module return under the failed_commands
key.  This fix also updates the Examples docstring to make it consistent
with other ios_* modules

fixes #5444
fixes #5372

thaim/ansible,thaim/ansible