* Avoid misleading PyVmomi error if requests import fails
Requests is imported by the VMware module_utils as an external
dependency; however, because it is in a try/catch block containing the
imports for PyVmomi, if requests fails to import properly, Ansible will
instead complain about PyVmomi not being installed.
By moving the import outside of the try/catch block, if requests fails
to import, an error like the following will be returned:
ImportError: No module named requests
This should result in less confusion.
* catch requests ImportError
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