Use 5 different region for scheduler client to run perf baseline testing

[sonyafenge]

930 release configuation:

$ export SERVER_ZONE=us-central1-a   SIM_ZONE=us-central1-a,us-east1-b,us-west2-a,us-west4-a,us-west3-c CLIENT_ZONE=us-west3-b,us-west3-b,us-central1-b,us-east1-c,us-central1-a

suggest for new baseline:

$ export SERVER_ZONE=us-central1-a   SIM_ZONE=us-central1-a,us-east1-b,us-west2-a,us-west4-a,us-west3-c CLIENT_ZONE=us-central1-a,us-east1-c,us-west2-a,us-west4-a,us-west3-b