NSFS | GPFS | PUT OBJECT | Fix for upload object of nested key - temp file flow

[romayalon]

Explain the changes

On PUT OBJECT of nested key (a/b) on GPFS namespace resource - the directory a/ was not created due to setting open_path = dirname(open_path), According to https://nodejs.org/api/path.html#pathdirnamepath - dirname(path) returns directory name of a path, similar to the Unix dirname command. Trailing directory separators are ignored.
Removing the last '/' caused make_path_dirs() to not create a/ because it's searching for the last index of '/' of the path.
Example -
open_path = 'a/b';
open_path = dirname(open_path); // = 'a'
make_path_dirs -> no '/' - nothing to create

Took Guy's code to fix this issue -

1. By not changing open_path, and setting dir_path = path.dirname(open_path) to a new variable, make_path_dirs created the nested object correctly.

Issues: Fixed #xxx / Gap #xxx

Testing Instructions:

1. Install NooBaa
2. Create GPFS namespace resource
3. put object key = a/b and check it was created correctly

• Doc added/updated
• Tests added