test/api.sh/vsphere: specify the resource pool for image import

Specify the resource pool when importing the VMDK to the VCenter.
This should prevent the following error:

govc: default resource pool resolves to multiple instances, please specify

Signed-off-by: Tomáš Hozza <thozza@redhat.com>

test/cases/api/common/vsphere.sh

@@ -137,6 +137,7 @@ function verifyInVSphere() {
         -u "${GOVMOMI_USERNAME}:${GOVMOMI_PASSWORD}@${GOVMOMI_URL}" \
         -k=true \
         -dc="${GOVC_DATACENTER}" \
+        -pool="${GOVMOMI_CLUSTER}"/Resources \
         -ds="${GOVMOMI_DATASTORE}" \
         "${WORKDIR}/${VSPHERE_IMAGE_NAME}" \
         "${VSPHERE_VM_NAME}"