Avoid timeout of SCT_ConditionsAlgorithms_TestTdaqEnabled_ctest

To avoid timeout, the number of evens is reduced from 20 to 6 and timeout was increased from 600 to 720.

http://atlas-computing.web.cern.ch/atlas-computing/links/distDirectory/gitwww/MASTERWebArea/nicos_web_areamaster_Athena_x86_64centos7gcc8opt64BC7G8AthenaOpt/NICOS_TestLog_2019-05-04T2136/InnerDetector_InDetConditions_SCT_ConditionsAlgorithms___SCT_ConditionsAlgorithmsConf__SCT_ConditionsAlgorithmsTest__m.html