Implements reduction: min/max #2268

Job	Run time
build (--disable-openmp, --with-yaml, --enable-deprecated-io)	1m 50s
build (--disable-openmp, --with-yaml, --disable-deprecated-io)	1m 48s
build (--disable-openmp, --enable-test-input=/home/unit_tests_input, --enable-deprecated-io)	1m 50s
build (--disable-openmp, --enable-test-input=/home/unit_tests_input, --disable-deprecated-io)	1m 52s
build (--enable-mixed-mode, --with-yaml, --enable-deprecated-io)	1m 49s
build (--enable-mixed-mode, --with-yaml, --disable-deprecated-io)	1m 50s
build (--enable-mixed-mode, --enable-test-input=/home/unit_tests_input, --enable-deprecated-io)	1m 51s
build (--enable-mixed-mode, --enable-test-input=/home/unit_tests_input, --disable-deprecated-io)	1m 50s
build (--disable-setting-flags, --with-yaml, --enable-deprecated-io)	1m 50s
build (--disable-setting-flags, --with-yaml, --disable-deprecated-io)	1m 46s
build (--disable-setting-flags, --enable-test-input=/home/unit_tests_input, --enable-deprecated-io)	1m 51s
build (--disable-setting-flags, --enable-test-input=/home/unit_tests_input, --disable-deprecated-io)	1m 50s
build (--with-mpi=no, --with-yaml, --enable-deprecated-io)	1m 53s
build (--with-mpi=no, --with-yaml, --disable-deprecated-io)	1m 51s
build (--with-mpi=no, --enable-test-input=/home/unit_tests_input, --enable-deprecated-io)	1m 51s
build (--with-mpi=no, --enable-test-input=/home/unit_tests_input, --disable-deprecated-io)	1m 50s
	29m 22s

Provide feedback