[concept-insights] Add builder methods to AccountPermission

[germanattanasio]

Add utility methods so that we don't need all the code below to create a corpus and give someone permission.

ConceptInsights service = new ConceptInsights();
service.setUsernameAndPassword("{username}", "{password}");

Corpus my_corpus = new Corpus(service.getAccountsInfo().getAccounts().get(0).getId(), "my_corpus");

// add corpus metadata (optional)
AccountPermission permission = new AccountPermission();
permission.setAccountId("testuser");
permission.setPermission("Read");
List<AccountPermission> accountPermissions = new ArrayList<AccountPermission>();
accountPermissions.add(permission);
my_corpus.setAccountPermissions(accountPermissions);
//

service.createCorpus(my_corpus);
System.out.println("Created corpus: "+ my_corpus.getName());

[germanattanasio]

I'm working on provide something like:

ConceptInsights service = new ConceptInsights();
service.setUsernameAndPassword("{username}", "{password}");

Corpus my_corpus = new Corpus(service.getFirstAccountId(), "my_corpus");
my_corpus.addAccountPermissions(new AccountPermission("testuser", Permission.READ));
service.createCorpus(my_corpus);

System.out.println("Created corpus: "+ my_corpus.getName());

@g-may what do you think?

[g-may]

That looks more user-friendly. Especially if you can write

my_corpus.addAccountPermissions(new AccountPermission("testuser", "ReadWrite"));

I think we should minimize SDK-specific learning required for people who already understand the base REST API.