Update valgrind tests and ignores

Change-Id: I5012e0c65ef771a75e3c58036e5bfd60eb673fd8
Fix server tests for valgrind execution

Change-Id: Idc9616f225c98a347ae9c4821991b0dca72bd869
Do not declare std::string inside modules, use char pointers

Change-Id: Id6bb7fc98e9cfba9ed8a2d593ba018078bc112d4