tests: ensure password field is cleared before typing password

test/features/support/world.ts

@@ -78,6 +78,10 @@ function CustomWorld() {
         return that.driver.findElement(seleniumWebdriver.By.id("username"))
           .sendKeys(username);
       })
+      .then(function () {
+        return that.driver.findElement(seleniumWebdriver.By.id("password"))
+          .clear();
+      })
       .then(function () {
         return that.driver.findElement(seleniumWebdriver.By.id("password"))
           .sendKeys(password);