add vendoring with go dep

vendor/github.com/vmware/govmomi/govc/test/README.md

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+# Functional tests for govc
+
+## Bats
+
+Install [Bats](https://github.com/sstephenson/bats/)
+
+## coreutils
+
+Install gxargs, greadlink and gmktemp on Darwin
+
+```
+brew install coreutils
+brew install findutils
+```
+
+## Download test images
+
+Some tests depend on ttylinux images, these can be downloaded by running:
+
+```
+./images/update.sh
+```
+
+These images are uploaded to the esxbox as needed by tests and can be
+removed with the following command:
+
+```
+./clean.sh
+```
+
+## GOVC_TEST_URL
+
+The govc tests need an ESX instance to run against.  The default
+`GOVC_TEST_URL` is that of the vagrant box in the *esxbox* directory:
+
+```
+(cd esxbox && vagrant up)
+```
+
+Any other ESX box can be used by exporting the following variable:
+
+```
+export GOVC_TEST_URL=user:pass@hostname
+```
+
+## vCenter Simulator
+
+Some tests require vCenter and depend on the Vagrant box in the
+*vcsim* directory.  These tests are skipped if the vcsim box is not
+running.  To enable these tests:
+
+```
+(cd vcsim && vagrant up)
+```
+
+## Running tests
+
+The test helper prepends ../govc to `PATH`.
+
+The tests can be run from any directory, as *govc* is found related to
+`PATH` and *images* are found relative to `$BATS_TEST_DIRNAME`.
+
+The entire suite can be run with the following command:
+
+```
+cd $GOPATH/github.com/vmware/govmomi/govc
+go build -v .
+bats test
+```
+
+Or individually, for example:
+
+```
+./test/cli.bats
+```