* use gcs client libs to copy checkpoint dir
* more minor cleanup, use tagged image, use newer pipeline param spec. syntax.
pylint cleanup.
added set_memory_limit() to notebook pipeline training steps.
modified the pipelines definitions to use the user-defined params as defaults.
* put a retry loop around the copy_blob
* initial import of Pipelines Github issue summarization examples & lab
* more linting/cleanup, fix tf version to 1.12
* bit more linting; pin some lib versions
* last? lint fixes
* another attempt to fix linting issues
* ughh
* changed test cluster config info
* update ktext package in a test docker image
* hmm, retrying fix for the ktext package update
Amy
Michelle Casbon
Amy