prepare release 5.0.0

use another custom uid in unittest

prepare for release 4.0.7

prepare for release 4.0.6

prepare for release 4.0.5

prepare 4.0.4 release

prepare 4.0.3 release

Preparations for 4.0.2 release.

Associated with release 4.0.1 on March 13, 2019.

Associated with release 4.0.0 on September 27, 2018