vsphere template: increase RAM used by jobs using large pool resource po...

We have had API crashes due to API job consuming whole system memory. We are deploying cloud foundry V188 on VCloud director, using stemcell vcloud_esxi_ubuntu_trusty_go_agent, build 2732.

API jobs use the large resource pool, which involve only 1Gb of RAM (the same as what is defined in small and medium resource pools).

On a fresh install, launching "bosh vms --vitals", we see that
   * api_z1/0 already use  1,1G
   * api_z2/0 700M.

Increasing the RAM size from 1G to 2G on large resource pool solve the problem.