Metacat

add test to check sync of access policies of data object referenced in EML 2.0.1 docs

initial basic test of inserting dryad metadata. NOTE: uses metacat api, not dataone api. https://projects.ecoinformatics.org/ecoinfo/issues/6419

include a few tests for isEqual method. https://projects.ecoinformatics.org/ecoinfo/issues/6407

Use client.MetacatClient instance for all metacat api calls

Test syncing of access policies when updated with legacy metacat api

Add a method to test an alias account in the ldap server.

Add a group for the testing.

Add users which are needed in the junit tests when the metacat is file-based authentication.
If users have been added, it just print out the exception.

Change the test file according to the change on the constructor.

Made changes according the changes in the AuthFile class.