Directive support added to journey

Fixed an issue in journey svgDraw.drawText expected an attribute (textMargin) but did not receive one and raised an error: <tspan> attribute x: Expected length, "NaN".
Added parseDirective to journeyDb

src/diagrams/user-journey/journeyRenderer.js

@@ -70,7 +70,8 @@ function drawActorLegend(diagram) {
       x: 40,
       y: yPos + 7,
       fill: '#666',
-      text: person
+      text: person,
+      textMargin: conf.boxTextMargin | 5
     };
     svgDraw.drawText(diagram, labelData);