Dynamic reason support for failfast in awaitility

[astubbs]

Get the dynamic fail fast patch committed, then update PC to use it.

See:

• https://github.com/awaitility/awaitility/issues/240

            waitAtMost(ofSeconds(30))
                    // dynamic reason support still waiting https://github.com/awaitility/awaitility/pull/193#issuecomment-873116199
                    // .failFast( () -> pc1.getFailureCause(), () -> pc1.isClosedOrFailed()) // requires https://github.com/awaitility/awaitility/issues/178#issuecomment-734769761
                    .failFast("A PC has died - check logs", () -> !noneHaveFailed(runnables)) // requires https://github.com/awaitility/awaitility/issues/178#issuecomment-734769761