Test bed prepare script
Test bed prepare script

Creates a master test plan with child test plans & runs
Prepares a set of test cases with random tags & testers
Links test cases to all test plans and test runs

Signed-off-by: Petr Šplíchal <760b301a0ea861ac9123a605d0cef152b5984de7@redhat.com>

psss/python-nitrate,ShaolongHu/python-nitrate,thrix/python-nitrate