tests/build-and-run-test.sh: fix systemd revision parameter
tests/build-and-run-test.sh: fix systemd revision parameter

This script had the parameter handling in the case statement, but not in
usage, and getopts.

Shashwatsh/rkt,cab105/rkt,joshix/rkt,cab105/rkt,alban/rkt,ybubnov/rkt,coreos/rkt,shobhit85/rkt,ybubnov/rkt,jonboulle/rkt,sstabellini/rkt,coreos/rkt,lucasallan/rkt,joshix/rkt,jonboulle/rkt,jakon89/rkt,dgonyeo/rkt,kinvolk/rkt,lucasallan/rkt,sstabellini/rkt,intelsdi-x/rkt,jakon89/rkt,achanda/rkt,intelsdi-x/rkt,sstabellini/rkt,Shashwatsh/rkt,alban/rkt,alban/rkt,rkt/rkt,rkt/rkt,intelsdi-x/rkt,dgonyeo/rkt,achanda/rkt,rkt/rkt,achanda/rkt,joshix/rkt,coreos/rkt,lucasallan/rkt,lucasallan/rkt,shobhit85/rkt,joshix/rkt,kinvolk/rkt,jonboulle/rkt,rkt/rkt,shobhit85/rkt,kinvolk/rkt,ybubnov/rkt,Shashwatsh/rkt,cab105/rkt,kinvolk/rkt,dgonyeo/rkt,jakon89/rkt