tests: Split ipv6 specific tests into a new test group

This way they can be easily disabled later on when IPv6 support is made
optional.

Change-Id: I3906dbf55ccf1650083398e08ac870add0bbdcef
diff --git a/tests/lib/in46a_test.ok b/tests/lib/in46a_test.ok
index 9a0ff7a..b497ad1 100644
--- a/tests/lib/in46a_test.ok
+++ b/tests/lib/in46a_test.ok
@@ -1,19 +1,17 @@
-Testing in46a_to_af()
-Testing in46a_to_sas()
-Testing in46a_ntop()
+Testing in46a_to_af() with IPv4 addresses
+Testing in46a_to_sas() with IPv4 addresses
+Testing in46a_ntop() with IPv4 addresses
 res = UNDEFINED
 res = UNDEFINED
 res = 1.2.3.4
-res = 102:304:506:708:90a:b0c:d0e:f10
 in46p_ntoa() returns 16.32.48.0/24
-Testing in46a_equal()
-Testing in46a_within_mask()
+Testing in46a_equal() with IPv4 addresses
+Testing in46a_within_mask() with IPv4 addresses
 in46a_within_mask(10.11.12.13, 10.11.12.13, 32) = 1
 in46a_within_mask(10.11.12.13, 10.11.12.12, 30) = 1
 in46a_within_mask(10.11.12.13, 10.8.0.0, 13) = 1
 in46a_within_mask(10.11.12.14, 10.11.12.13, 32) = 0
 in46a_within_mask(10.11.12.14, 10.11.12.12, 30) = 1
-testing in46a_to_eua()
-Testing in46a_from_eua()
+testing in46a_to_eua() with IPv4 addresses
+Testing in46a_from_eua() with IPv4 addresses
 Testing in46a_netmasklen() with IPv4 addresses
-Testing in46a_netmasklen() with IPv6 addresses