90125aa885
This patch replaces the legacy retrying library with the newer and more convenient tenacity one, taking into account that: 1) retrying uses milliseconds for wait times, but tenacity uses seconds; 2) retrying has a lot of numeric arguments for specifying behaviour of decorated functions, while tenacity has a few of them, which are specialized objects, thus making the retry-decorator more flexible. Change-Id: Ib6ecffe5d1cf292badbb9eb6db6260f17460f343 Closes-Bug: #1635399