Run build_ext in build_python step

Make python test suites run in parallel

Refcounting fix for bug exposed by qps_test

We suffered a bug whereby doing a follow-up write to another write could
resurrect a deleted stream, causing all sorts of crash.

Fix: when a stream becomes writable (vs when we start writing) take a
ref on the stream, and only relinquish it once we're done writing.

Revert "Update reconnect_interop_server.cc"

Revert "Update reconnect_interop_client.cc"

Add troubleshooting section to Python package description.

Maintain correct invariants against core.

Update reconnect_interop_server.cc

Update reconnect_interop_client.cc

Fix esan detected race in subchannel state

Fix ServerTryCancel in end2end tests

Added comment for gyp

updated templates/README.md

Don't do a "safety" Cancel when recv_close_on_server.cancelled is set.

could be an arbitrary amount of time between when the cancel is tried
and actually observable.

Fix run_tests.py reporting for multiple test runs

Simplify PHP installation

Fix flaky test:  End2endServerTryCancelTest.ResponseStreamServerCancelAfter 

clang-format sanity fix

Remove broken test

This test is inherently flaky and I don't see any way to make it not so.
Historically this test has not (in my memory) given any signal that something is actually broken.

Let's save maintenance and just nuke it.