deallocate arrays in interpolator_end #2251

Job	Run time
build (--disable-openmp, --with-yaml, --enable-deprecated-io)	12m 10s
build (--disable-openmp, --with-yaml, --disable-deprecated-io)	9m 24s
build (--disable-openmp, --enable-test-input=/home/unit_tests_input, --enable-deprecated-io)	12m 32s
build (--disable-openmp, --enable-test-input=/home/unit_tests_input, --disable-deprecated-io)	9m 56s
build (--enable-mixed-mode, --with-yaml, --enable-deprecated-io)	10m 24s
build (--enable-mixed-mode, --with-yaml, --disable-deprecated-io)	11m 12s
build (--enable-mixed-mode, --enable-test-input=/home/unit_tests_input, --enable-deprecated-io)	10m 32s
build (--enable-mixed-mode, --enable-test-input=/home/unit_tests_input, --disable-deprecated-io)	10m 3s
build (--disable-setting-flags, --with-yaml, --enable-deprecated-io)	11m 29s
build (--disable-setting-flags, --with-yaml, --disable-deprecated-io)	11m 15s
build (--disable-setting-flags, --enable-test-input=/home/unit_tests_input, --enable-deprecated-io)	10m 59s
build (--disable-setting-flags, --enable-test-input=/home/unit_tests_input, --disable-deprecated-io)	11m 57s
build (--with-mpi=no, --with-yaml, --enable-deprecated-io)	4m 20s
build (--with-mpi=no, --with-yaml, --disable-deprecated-io)	4m 9s
build (--with-mpi=no, --enable-test-input=/home/unit_tests_input, --enable-deprecated-io)	5m 2s
build (--with-mpi=no, --enable-test-input=/home/unit_tests_input, --disable-deprecated-io)	3m 54s
	2h 29m 18s

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