[v6r10] Minor fixes

FIX: dirac-dms-show-se-status - exit on error in the service call, closes #1840
FIX: API.Job - removed special interpretation of obsoleted JDLreqt type parameters
FIX: SSHComputingElement - increased timeout in getJobStatusOnHost() ssh call, closes #1830
FIX: TaskQueueDB - reduced number of lines in the matching parameters printout