Merge pull request #1011 in CASA/casa from bugfix/CAS-12165 to master
* commit 'dc32a87ae57b530bcb5b0b8de5d6ae35f73f2466':
Fixed nchan < no. server nodes issue in parallel cube imaging
Fix nchan < n node issue
Merge pull request #1010 in CASA/casa from CAS-12521 to master
* commit 'b0a787d2f8415ce01e522226d526e220d9b436df':
Update opacity values in plotweather due to ATM change
Merge pull request #1009 in CASA/casa from feature/CAS-12475 to master
* commit '8caa38cbdde4b52db0d2b67b45e0fdd0eba375ce':
update unit test for nrobeamaverage.
add a unit test for nrobeamaverage.
update nrobeamaverage task code to fix for infiles
add files for a new task nrobeamaverage.
Merge pull request #1008 in CASA/casa from bugfix/CAS-12145 to master
* commit '887726cce261d0ec6822e8d45b0fcb8f57285058':
A minor doc edit
Fixed append=True mode, and updated ducumentation
Added checks for fluxtable and to raise an execption if it is not specied or the specified file/table already exists.
Merge pull request #1007 in CASA/casa from CAS-12520 to master
* commit '5485f1083b95e512c2fce86f5ab0fe9eba863b64':
fix weird tab-indentation in the middle of space-indented functions, CAS-12520
fix PyArray_Descr leaks using NPY API rather than manual malloc+memcpy, CAS-12520
