test: repro: fix link types

tests/func/test_repro.py

@@ -810,7 +810,7 @@ class TestReproExternalBase(TestDvc):
 
     @property
     def cache_type(self):
-        return "hardlink"
+        return "copy"
 
     @property
     def scheme(self):
@@ -997,10 +997,6 @@ class TestReproExternalHDFS(TestReproExternalBase):
     def scheme(self):
         return "hdfs"
 
-    @property
-    def cache_type(self):
-        return "copy"
-
     @property
     def bucket(self):
         return "{}@127.0.0.1".format(getpass.getuser())
@@ -1108,6 +1104,10 @@ class TestReproExternalLOCAL(TestReproExternalBase):
         self.assertEqual(ret, 0)
         self.dvc = DvcRepo(".")
 
+    @property
+    def cache_type(self):
+        return "hardlink"
+
     def should_test(self):
         return True