hs-test: use consistent naming convention

Exported indentifiers in Go start with capital letters. Only few fields
in hs-test, which are being unmarshaled from yaml are required to be
exported. Every other field name or method name should start with
lower-case letter, to be consistent with this naming convention.

Type: test
Signed-off-by: Maros Ondrejicka <mondreji@cisco.com>
Change-Id: I7eab0eef9fd08a7890c77b6ce1aeb3fa4b80f3cd
diff --git a/extras/hs-test/mirroring_test.go b/extras/hs-test/mirroring_test.go
index 6c42fe8..96cb348 100644
--- a/extras/hs-test/mirroring_test.go
+++ b/extras/hs-test/mirroring_test.go
@@ -5,7 +5,7 @@
 )
 
 func (s *NginxSuite) TestMirroring() {
-	proxyAddress := s.netInterfaces[mirroringClientInterfaceName].Peer().IP4AddressString()
+	proxyAddress := s.netInterfaces[mirroringClientInterfaceName].peer.ip4AddressString()
 
 	path := "/64B.json"