slapos-testing: Provide IPv6 for tests

Some tests need to play with IPv6, and it would be better, if they would use
IPv6 on which the test system has control.

/reviewed-on nexedi/slapos!467

software/slapos-testing/buildout.hash.cfg

@@ -15,5 +15,5 @@
 
 [template]
 filename = instance.cfg
-md5sum = f27dd22ce5b925dd81f2fcd988b10691
+md5sum = 2af05c83ea9525ac3c6816ee0365876c
 

software/slapos-testing/instance.cfg

@@ -84,6 +84,7 @@ command-line =
 environment =
   PATH=${coreutils:location}/bin:${curl:location}/bin:${openssl:location}/bin:${git:location}/bin:${libxslt:location}/bin:${socat:location}/bin:/usr/bin/:/bin/
   LOCAL_IPV4=$${slap-configuration:ipv4-random}
+  LOCAL_IPV6=$${slap-configuration:ipv6-random}
 
 
 [phantomjs-wrapper]