add test cases
overwrote
[NCF-267]/SAI-630695

Add support for embedded NUL characters
in character arrays and added some test cases.

Note that embedded NULs in netcdf-4
string constants are still illegal. This is
because strings are not counted in the netcdf
API, so they are implicitly NUL terminated.
add test cases
overwrote
[NCF-267]/SAI-630695

Add support for embedded NUL characters
in character arrays and added some test cases.

Note that embedded NULs in netcdf-4
string constants are still illegal. This is
because strings are not counted in the netcdf
API, so they are implicitly NUL terminated.
resolve conflicts