Merge pull request #964 in CASA/casa from feature/CAS-12469 to master
* commit '13af22bc7454445bc38c1d8ccd0f571dc0a96b2b':
Adding tests for delmod, feather, imrebin, uvmodelfit, and imreframe
Merge pull request #977 in CASA/casa from CAS-12487 to master
* commit '7ed57adebceabd8888612bea67ed0ec172bd6d5a':
Removed async from list in flaghelper. Renamed variable async to async_mode in parallel_task_helper.
Merge pull request #975 in CASA/casa from CAS-12478 to master
* commit '7ab77a91d0a7887b574a37ed926fb04dbbcbc2da':
synthesis* tools: unique_ptr to protect tmp Records from toRecord(), CAS-12478
synthesisimager: ensure tmp Records from toRecord() are released , CAS-12478
Merge pull request #976 in CASA/casa from CAS-12484 to master
* commit '945df12cdd623b3440611ab2cdc9d0921a861b5e':
fix recursive leak in toRecord(), use unique_ptr to manage toRecord() ptrs, CAS-12484
