PR for 0.4.11 release

[wnojopra]

This release includes:

• dsub
  • setup.py: Update dsub dependent libraries to pick up newer versions
• google-batch provider updates:
  • Use google-batch stdout/stderr log files
  • Increase default boot disk size for Batch provider to 30GB.
  • Extend batch support for network, subnetwork, private IP, accelerator, min cpu, min ram, boot disk, and machine type.
    • Huge #thanks to @mccstan for their contribution in Feature/extend batch support #285
• tests
  • Fix flaky e2e_dstat.sh test. Print more data on test error in get_data_value.py.

[mbookman]

LGTM