Fix for #3270#3293

Merged

twiecki merged 8 commits intopymc-devs:masterfrom

lucianopaz:iss3270

Jan 3, 2019

Commits on Dec 5, 2018

Partial fix. Got stumped with LKJCholeskyCov not having a random method
lucianopaz
committed

Commits on Dec 7, 2018

Fixed the basic defects. Still must do new tests.
lucianopaz
committed
Added test for sampling prior and posterior predictives from a mixture based on issue #3270
lucianopaz
committed

Commits on Dec 10, 2018

Commits on Dec 11, 2018

Added tests for DrawValuesContext and also for the context blocker that was introduced in this PR.
lucianopaz
committed

Commits on Jan 3, 2019