add underscores to private functions in integration tests

Author: tristanpwdennis

tests/integration/test_amin1.py

@@ -2,7 +2,7 @@
 import pytest
 
 from malariagen_data import Amin1, Region
-from malariagen_data.util import locate_region, resolve_region
+from malariagen_data.util import _locate_region, _resolve_region
 
 
 def setup_amin1(url="simplecache::gs://vo_amin_release_master_us_central1/", **kwargs):
@@ -40,10 +40,10 @@ def test_locate_region(region_raw):
     # TODO Migrate this test.
     amin1 = setup_amin1()
     gene_annotation = amin1.geneset(attributes=["ID"])
-    region = resolve_region(amin1, region_raw)
+    region = _resolve_region(amin1, region_raw)
     pos = amin1.snp_sites(region=region.contig, field="POS")
     ref = amin1.snp_sites(region=region.contig, field="REF")
-    loc_region = locate_region(region, pos)
+    loc_region = _locate_region(region, pos)
 
     # check types
     assert isinstance(loc_region, slice)