OPERA R6 DIST-S1 PGE Release Candidate 2.0

Official release candidate v2.0 of the R6 DIST-S1 PGE. This version incorporates the v2.0.4 "CalVal" release of the DIST-S1 SAS.

What's Changed

• DIST-S1 PGE CalVal 4.1 SAS v2.0.4 Integration by @RKuttruff in #723
• DIST-S1 PGE release v6.0.0-rc.2.0 by @RKuttruff in #726
• [RERELEASE] DIST-S1 PGE release v6.0.0-rc.2.0 SAS v2.0.5 by @RKuttruff in #727

Full Changelog: 3.0.3-dswx-s1...6.0.0-rc.2.0