hs-test: add runtime options

Options
 "-p" to not remove topology elements after the test finishes
 "-v" from now on extra output from tests is hidden by default,
      this will show it again

Type: test
Signed-off-by: Maros Ondrejicka <maros.ondrejicka@pantheon.tech>
Change-Id: I626188561c883534e9004d5130ee2a972d12b4e2
diff --git a/extras/hs-test/echo_test.go b/extras/hs-test/echo_test.go
index 9bc8f76..813297c 100755
--- a/extras/hs-test/echo_test.go
+++ b/extras/hs-test/echo_test.go
@@ -1,9 +1,5 @@
 package main
 
-import (
-	"fmt"
-)
-
 func (s *VethsSuite) TestEchoBuiltin() {
 	serverContainer := s.getContainerByName("server-vpp")
 	_, err := serverContainer.execAction("Configure2Veths srv")
@@ -18,5 +14,5 @@
 
 	o, err := clientContainer.execAction("RunEchoClnInternal nclients 10000 bytes 1 syn-timeout 100 test-timeout 100 no-return private-segment-size 1g fifo-size 4")
 	s.assertNil(err)
-	fmt.Println(o)
+	s.log(o)
 }