Fix the broken validations test

[djansen-redhat]

The validation error box function was not searching the right place
for the appropriate component.

[seanf]

Instead of repeating transUnitCol, 1 and gwt-DisclosurePanel, perhaps we could extract constants to reuse?

Or better still, extract a method like:

Element findGwtDisclosurePanel(Driver driver) {
    return driver.findElement(By.className("selected"))
        .findElements(By.className("transUnitCol"))
        .get(1) // Right column
        .findElement(By.className("gwt-DisclosurePanel"))
}

And use it in all four places.

[djansen-redhat]

Did the latter. Was going to do it in a later change, but here is appropriate.

[seanf]

👍