VMware: Simplify logic get_network_with_the_name

[Shawn Hartsock]

The method get_network_with_the_name features several points of repeated code that does not need to be repeated.
* network._type is always a unique and valid argument for get_dynamic_property
* networks will usually have 0 or 1 result, more results will be due to networks sharing the same name which will make them indistinguishable (this should be considered an exceptional case)
* multiple return points should not be necessary particularly since we are working with 0 or 1 valid values.

See:

https://github.com/openstack/nova/blob/master/nova/virt/vmwareapi/network_util.py#L32

[Markus Zoeller (markus_z) (mzoeller)]

This wishlist bug has been open a year without any activity. I'm going to move it to "Opinion / Wishlist", which is an easily-obtainable queue of older requests that have come on. This bug can be reopened (set back to "New") if someone decides to work on this.