Suppress warnings from boost.

Done by using the disable_warnings.h and reenable_warnings.h headers.
In some cases also a little reordering of includes, to put all boost
includes in the warning-suppressed part.

opm/parser/eclipse/Generator/tests/KeywordLoaderTests.cpp

@@ -19,12 +19,15 @@
 
 #include <stdexcept>
 #include <iostream>
-#include <boost/filesystem.hpp>
 #include <cstdio>
 
 #define BOOST_TEST_MODULE InputKeywordTests
+
+#include <opm/core/utility/platform_dependent/disable_warnings.h>
+#include <boost/filesystem.hpp>
 #include <boost/test/unit_test.hpp>
 #include <boost/date_time/posix_time/posix_time.hpp>
+#include <opm/core/utility/platform_dependent/reenable_warnings.h>
 
 
 #include <opm/parser/eclipse/Generator/KeywordLoader.hpp>