[master] Set lockfile path for DHCP tests

src/bin/dhcp4/tests/Makefile.am

@@ -16,6 +16,7 @@ check-local:
 	for pytest in $(PYTESTS) ; do \
 	echo Running test: $$pytest ; \
 	PYTHONPATH=$(COMMON_PYTHON_PATH):$(abs_top_srcdir)/src/bin:$(abs_top_builddir)/src/bin/bind10:$(abs_top_builddir)/src/lib/util/io/.libs \
+	B10_LOCKFILE_DIR_FROM_BUILD=$(abs_top_builddir) \
 	$(LIBRARY_PATH_PLACEHOLDER) \
 		$(PYCOVERAGE_RUN) $(abs_srcdir)/$$pytest || exit ; \
 	done

src/bin/dhcp6/tests/Makefile.am

@@ -15,6 +15,7 @@ check-local:
 	for pytest in $(PYTESTS) ; do \
 	echo Running test: $$pytest ; \
 	$(LIBRARY_PATH_PLACEHOLDER) \
+	B10_LOCKFILE_DIR_FROM_BUILD=$(abs_top_builddir) \
 	PYTHONPATH=$(COMMON_PYTHON_PATH):$(abs_top_srcdir)/src/bin:$(abs_top_builddir)/src/bin/bind10:$(abs_top_builddir)/src/lib/util/io/.libs \
 		$(PYCOVERAGE_RUN) $(abs_srcdir)/$$pytest || exit ; \
 	done