Not all processing periods are available in the filter in the Stockouts report

I noticed an issue when I was executing OLMIS-6277: Not all processing periods that are available in the table are available in the "Processing Period" filter drop-down.

Reproduction steps:

1. Log into the application as administrator.

2. Go to Reports > View Reports > Stockouts.

3. Compare the content of the "Processing Period" filter drop-down and of the "Processing Period" column in the "Reporting Rate and Timeliness" section.

4. The "Jan2017" and "Feb2017" periods are missing from the filter.

Expected results:

• All processing periods visible in the "Reporting Rate and Timeliness" section should be available in the filter.