Added an error if oqparam.imtls is empty
Added an error if oqparam.imtls is empty


Former-commit-id: 77b12946b876ed4ef2095527c9e3c3a970ec3763 [formerly 01a33cbdf39bd2d2ae93b93dd03dfddac61ef814]
Former-commit-id: acf1bf7025d1963aa76f2aa06674c0fe1e8dc56c
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine