test_api: add test_create_build_from_buildrequest
test_api: add test_create_build_from_buildrequest

vrutkovs/osbs-client,projectatomic/osbs-client,vrutkovs/osbs-client,projectatomic/osbs-client,bfontecc007/osbs-client,DBuildService/osbs-client,DBuildService/osbs-client,bfontecc007/osbs-client