NSFS | set supplemental groups dynamically to users groups

[nadavMiz]

Explain the changes

1. get user supplemental dynamically by calling getgrouplist. getgrouplist will scan the system for all groups that the user is a part of. that way will be able to set the users groups without specifying them in the account configuration. if specified, supplemental groups set by the account configuration will take precedence, and be set as the users groups. also in case no record of the user can be found in the os and no supplemental groups were defined in the account the supplemental groups list will be set as empty
2. some tests were using the uid 5, which is a system reserved uid, causing the feature to give them root group permissions. changed the uid and gid to ones not reserved by the OS

Issues: Fixed #xxx / Gap #xxx

Testing Instructions:

1. sudo node ./node_modules/mocha/bin/mocha src/test/unit_tests/test_nsfs_access.js

GAPS

not implemented for mac - since all functions used are defined by posix it should be the same. but still require testing
also added helper testing functions for adding new group that require implementation for mac. should probably be done with sudo dscl . like adding new user, but again need to test this

• Doc added/updated
• Tests added