Ignore inactive connections

When waiting for an expected amount of connections in tests, there are
occurences of repetition due to an "in-flight" connections that are
apparently got caught without close timestamp. Ignore those.

Author: erthalion

integration-tests/pkg/mock_sensor/expect_conn.go

@@ -72,6 +72,12 @@ loop:
 			if conn.GetContainerId() != containerID {
 				continue loop
 			}
+			// If we observe an "in-flight" connection without a closed
+			// timestamp, ignore it as we will get it later with full
+			// information.
+			if !conn.IsActive() {
+				continue loop
+			}
 			if len(s.Connections(containerID)) == n {
 				return s.Connections(containerID)
 			}