[boost] [test] Missing implementation for boost::itest::manager

When linking against the test execution monitor lib, the implementation for boost::itest::manager is missing from the library. The header file for the class gets picked up like this: logged_expectations.cpp => logged_expectations.ipp => interaction_based.hpp. It looks like interaction_based is missing from the list of sources (TEST_EXEC_MON_SOURCES) in the libs/test/build/Jamfile Markus