[1LP][RFR] ParametrizedSummaryTable.is_displayed support

[izapolsk]

I see two ways to fix this:

1. add locator
2. copy SummaryTable.BASELOC to ParametrizedSummaryTable.ROOT + ParametrizedString

I chose first way.

[mshriver]

I definitely prefer this solution to option #2. I also think directly implementing ParametrizedSummaryTable.is_displayed (returning self._table.is_displayed) would be a good approach since this class is a ParametrizedView, not a widget, and doesn't really have its own locator. All of its methods are just wrapping calls to SummaryTable. through self._table.

[mfalesni]

I really need to figure out how to parametrize a single widget, instead of having workarounds with a view containing a "private" widget. :)

[mshriver]

PRT failures look directly related, as they're failing to find the Relationships table on provider details for stat validation.

[jawatts]

Tested the changes locally and observed the same failures. I tried a different fix by implementing is_displayed within ParametrizedSummaryTable and

@property
    def is_displayed(self):
        return self._table.is_displayed

Failures were not observed with this fix. Maybe an alternate fix?

[izapolsk]

@mfalesni, honestly, I think we have to remove that private widget and move code to primary table instead. But this change requires some efforts. so, I don't consider it atm :)