When running make test-network-all, use the mixed+hs-v2 network

No behaviour change.

A previous fix to chutney removed v3 onion services from the
mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
confusing.

Fixes bug 27345; bugfix on 0.3.2.1-alpha.

changes/bug27345

+  o Minor bugfixes (testing):
+    - When running make test-network-all, use the mixed+hs-v2 network.
+      (A previous fix to chutney removed v3 onion services from the
+      mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
+      confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.

src/test/include.am

@@ -47,7 +47,7 @@ TEST_CHUTNEY_FLAVORS = basic-min bridges-min hs-v2-min hs-v3-min \
 TEST_CHUTNEY_FLAVORS_IPV6 = bridges+ipv6-min ipv6-exit-min hs-v23-ipv6-md \
 	single-onion-ipv6-md
 # only run if we can find a stable (or simply another) version of tor
-TEST_CHUTNEY_FLAVORS_MIXED = mixed+hs-v23
+TEST_CHUTNEY_FLAVORS_MIXED = mixed+hs-v2
 
 ### This is a lovely feature, but it requires automake >= 1.12, and Tor
 ###  doesn't require that yet.