Cleaning of cached values when using configure.
2-3x performance improvement of Multiplexer.
Before improvement:
           170219 52.5755 libgcc_s.so.1
            46730 14.4335 libstdc++.so.6.0.20
            39822 12.2998 libc-2.19.so
            29650  9.1580 libpthread-2.19.so
	     3410  1.0532 libsiox-util.so

Reason:
Thrown exceptions (which were ignored anyway) need a lot of time to integrate their callstack. Example callstack:
    insn_end=0x7f6957813318 "\024", context=context@entry=0x7fff4e753ff0, fs=fs@entry=0x7fff4e7540e0)
    at ../.././libgcc/unwind-dw2.c:942
    at ../.././libgcc/unwind-dw2.c:1293
    dest=0x7f69577b6930 <std::out_of_range::~out_of_range()>) at ../../.././libstdc++-v3/libsupc++/eh_throw.cc:82
    at ../../../.././libstdc++-v3/src/c++11/functexcept.cc:87
    at /usr/include/c++/4.8/bits/hashtable_policy.h:544
    at ../src/monitoring/activity_multiplexer/ActivityMultiplexerSync.cpp:50