Refresh datastore files through EMS

[agrare]

Refreshing datastore files just use the VIM SDK which can be done
through the EMS not the Host.

https://bugzilla.redhat.com/show_bug.cgi?id=1529725

[miq-bot]

Checked commit agrare@50f8330 with ruby 2.3.3, rubocop 0.47.1, haml-lint 0.20.0, and yamllint 1.10.0
2 files checked, 3 offenses detected

app/models/manageiq/providers/vmware/infra_manager.rb

• ⚠️ - Line 520, Col 9 - Lint/ShadowedException - Do not shadow rescued Exceptions.
• ❗ - Line 525, Col 13 - Style/SafeNavigation - Use safe navigation (&.) instead of checking if an object exists before calling the method.
• ❗ - Line 539, Col 68 - Style/MultilineMethodCallBraceLayout - Closing method call brace must be on the line after the last argument when opening brace is on a separate line from the first argument.

[agrare]

cc @roliveri

[simaishi]

Gaprindashvili backport details:

$ git log -1
commit 0f1be9296d91fd6a7ac1b864a7c677d16d0fe65e
Author: Jason Frey <[email protected]>
Date:   Mon Jan 15 11:28:54 2018 -0500

    Merge pull request #170 from agrare/bz_1529725_refresh_storages_through_ems
    
    Refresh datastore files through EMS
    (cherry picked from commit 95d1303f75d1ba3fc1f9f71f33dd7ad2cef8e1f0)
    
    https://bugzilla.redhat.com/show_bug.cgi?id=1534753