Changes to provisioning script to setup webui and compute for vcenter mode. deleted the testbed_vcenter_esxi example and intergrated all the necessary testbed params in to testbed_multibox_example with explanation of each field

Change-Id: I520202c11359d3c2dbf3eba3cd1db42f570c24fb
Merge "Changes to provisioning script to setup webui and compute for vcenter mode. deleted the testbed_vcenter_esxi example and intergrated all the necessary testbed params in to testbed_multibox_example with explanation of each field"