Use random org and space if not provided
Use random org and space if not provided

The random org and space for smoke tests are generated by
cf-test-helpers when they are not provided in the configuration.

[#145692665]

Signed-off-by: Maria Ntalla <db175d1e767b01513ca4f1524312ca03f02099ed@pivotal.io>

pivotal-cf/cf-redis-smoke-tests,pivotal-cf/cf-redis-smoke-tests