hs-test: configure VPP from test context

Instead of configuring VPP instances running inside of a container,
now the configuration is going to be done from within the test context
by using binary API and shared volume that exposes api socket.

This converts just some of the test cases, rest is to follow.

Type: test
Signed-off-by: Maros Ondrejicka <maros.ondrejicka@pantheon.tech>
Change-Id: I87e4ab15de488f0eebb01ff514596265fc2a787f
diff --git a/extras/hs-test/ldp_test.go b/extras/hs-test/ldp_test.go
index 2dfdf8b..cbba227 100644
--- a/extras/hs-test/ldp_test.go
+++ b/extras/hs-test/ldp_test.go
@@ -10,12 +10,10 @@
 	var clnVclConf, srvVclConf Stanza
 
 	serverContainer := s.getContainerByName("server-vpp")
-	serverVolume := serverContainer.getVolumeByHostDir("/tmp/server")
-	srvVcl := serverVolume.containerDir + "/vcl_srv.conf"
+	srvVcl := serverContainer.GetHostWorkDir() + "/vcl_srv.conf"
 
 	clientContainer := s.getContainerByName("client-vpp")
-	clientVolume := clientContainer.getVolumeByHostDir("/tmp/client")
-	clnVcl := clientVolume.containerDir + "/vcl_cln.conf"
+	clnVcl := clientContainer.GetHostWorkDir() + "/vcl_cln.conf"
 
 	ldpreload := os.Getenv("HST_LDPRELOAD")
 	s.assertNotEqual("", ldpreload)
@@ -28,20 +26,14 @@
 
 	s.log("starting VPPs")
 
-	originalWorkDir := serverContainer.workDir
-	serverContainer.workDir = serverVolume.containerDir
 	_, err := serverContainer.execAction("Configure2Veths srv")
 	s.assertNil(err)
-	serverContainer.workDir = originalWorkDir
 
-	originalWorkDir = clientContainer.workDir
-	clientContainer.workDir = clientVolume.containerDir
 	_, err = clientContainer.execAction("Configure2Veths cln")
 	s.assertNil(err)
-	clientContainer.workDir = originalWorkDir
 
 	clientAppSocketApi := fmt.Sprintf("app-socket-api %s/var/run/app_ns_sockets/2",
-		clientVolume.containerDir)
+		clientContainer.GetContainerWorkDir())
 	err = clnVclConf.
 		NewStanza("vcl").
 		Append("rx-fifo-size 4000000").
@@ -54,7 +46,7 @@
 	s.assertNil(err)
 
 	serverAppSocketApi := fmt.Sprintf("app-socket-api %s/var/run/app_ns_sockets/1",
-		serverVolume.containerDir)
+		serverContainer.GetContainerWorkDir())
 	err = srvVclConf.
 		NewStanza("vcl").
 		Append("rx-fifo-size 4000000").