Hdf5 1 10 merges from dev (#662)

* HDFFV-10865 - merge from dev, HDFArray perf fix.

* Remove duplicate setting

* Whitespace changes after clang format

* Undo version 11 clang format changes

* Merge CMake changes from develop

* test testing script merge from develop

* Update supported platforms

* PR#3 merge from develop

* Merge gcc 10 diagnostics option from develop

* Merge #318 OSX changes from develop

* Merge small changes from develop

* Minor non-space formatting changes

* #386 copyright corrections for java folder

* Merges from develop

#358 patches from vtk
#361 fix header guard spelling

* Merge updates

#358 patches from vtk
#361 fix header guard spelling

* format fix

* Fix missing underscore and make H5public.h closer to dev

* Merges from develop

#340 clang -Wformat-security warnings
#360 Fixed uninitialized warnings
header guard underscore cleanup
JNI cleanup

* format alignment

* Add missing test ref file

* Merge #380 from develop

* Finish java merges from develop

* Fix java issues with tests and javadoc

* Correct use of attribute access plist

* Remove debug code

* Remove unused variable

* Change file access to read only for java tests

* Split clang format operations.

* More javadoc comments

* Remove pre-split setting

* format source

* Change windows TS to use older VS.

* Mostly all javadoc fixes, one argument rename.

* synch file

* Merge of long double fix and compiler flags

* HDFFV-11229 merge changes from develop

* HDFFV-11229 correct test script

* HDFFV-11229 update autotools test script for two ref files

* HDFFV-11229 merge dev changes for long double display in tools

* Committing clang-format changes

* minor whitespace

* remove unneeded macro

* Committing clang-format changes

* Add "option" command for clang options

* Rework CMake add_custom to use the BYPRODUCTS argument

Update pkgconfig scripts for parallel builds.
Fix install COPYING file reference.
Remove unused round defines.
Change CMake default setting of BUILD_CPP to off.

* Fortran target depends

* Remove incorrect source attribute

* Revert define removal

* printf specifiers and VS2015 min changes

* Committing clang-format changes

* Add time struct

* TRILAB-227 and tools debug merges from develop

* Merge various changes from dev

* Issue #669 remove version from pkgcfg filename

* remove version from h5cc script

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