message: remove conditional boost installation, make it required
diff: @@ -207,7 +207,6 @@ else()
  set(EMHASHMAP_LIBS_DIRECTORY ${BSON_LIBS_DIRECTORY} CACHE INTERNAL "Installation path of emashmap libraries" FORCE)
  endif()
  -if (HMIADAPTER STREQUAL "messagebroker")
  find_package(Boost 1.66.0 COMPONENTS system filesystem)
  set(BOOST_LIB_SOURCE_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/boost_src)
  set(BOOST_LIBS_DIRECTORY ${3RD_PARTY_INSTALL_PREFIX}/lib)
  @@ -235,7 +234,6 @@ if (HMIADAPTER STREQUAL "messagebroker")
  set(BOOST_INCLUDE_DIR ${BOOST_ROOT_DIR}/Boost-prefix/src/Boost)
  set(BOOST_LIB_DIR ${BOOST_ROOT_DIR}/Boost-prefix/src/Boost/stage/lib/)
  endif()
  -endif()
  add_custom_target(install-3rd_party
  DEPENDS ${install-3rd_party_logger_var}
  