* Remove unnecessary code in OpenStackShell.initialize_app() - only
the bits it instantiate our subclass of ClientManager remain
* Remove OSC_Config - with https://review.opendev.org/#/c/678095/
the last remaining required bit moves to osc-lib
Thos requires osc-lib 1.14.0
Change-Id: Ia4b3c737de9dc34949e74632441621014ef9eea9
Signed-off-by: Dean Troyer <dtroyer@gmail.com>