Add ATLAS_CHECK_THREAD_SAFETY to InDetServMatGeoModel package with fixing some constness problems.

• In order to confirm and keep thread safety of the InDetServMatGeoModel package, ATLAS_CHECK_THREAD_SAFETY file was added.
• Some changes were necessary
  • ATLAS_THREAD_SAFE of #include "CxxUtils/checker_macros.h" was added to mutable Athena::MsgStreamMember m_msg
  • Make Route* nextRoute() method non-const
  • Make matMgr() method non-const
  • Make getServices() method const
  • Make return type of builderTool() const const.
• Results should not be changed
• RunTier0Tests.py was fine. RunTier0Tests.log
• No JIRA ticket