[JIRAALIGN-1947] Estimation Trend report: No data returned if you filter by PI

Issue Summary

If you select a Program in the config bar and nothing else, then set the extra configs to Program Increment and Program, the page works. See screenshot for works - notice config bar.

If users try to narrow the scope a bit, and add a filter for PIs, and filter by fewer PIs than the above report, I get nothing back. See screenshot for fails - notice config bar.

Steps to Reproduce

1. Step 1  - Meet Estimation Trend Report Requirements/Prerequisites 
2. Step 2 -  Select multiple PIs and Program in Tier One
3. Step 3 - Run estimation trend report: Modify Extra Config: Set Program Increment & Program  (less PIs than tier one)
4. Step 4 - See results

Expected Results

If I go to the estimation trend report, filter by a program and some PIs, I expect the report to load just the PIs I entered.

Actual Results

No data is returned

Workaround

Select the program, and make sure you don't select ANY PIs in config bar. Then report loads.