Added support for children monitors
Added support for children monitors


Former-commit-id: 156e8a65d272bf4aeff0585df0657aab7fb9cacc [formerly 156e8a65d272bf4aeff0585df0657aab7fb9cacc [formerly 55f23351eacb3c5b550682c754c2e70380f10188]]
Former-commit-id: 40416b4bab1d6faa75dd4eb4d56c52c305928285
Former-commit-id: 20151595a917f623c36e52c8c9c062ff19976c44
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine