JAMES-3945 Subaddressing - case sensitivity and subfolders

[florentos17]

1. Currently we have a case sensitivity problem: folders are case sensitive whereas email addresses are not. We would want both fazavant+folder@domain and fazavant+Folder@domain to be delivered in my folder Folder. Moreover, if both folder and Folder exist, the correct one should be selected.

2. Since we agreed to give the p right to either noone or anyone, there is no need for unit tests about whitelists and blacklists: I removed them

3. We want to check whether a subfolder can be subaddressed. I wrote a unit test that sends an email to fazavant+folder/subfoder@domain, and it seems to be all good :) is that enough or should I write more advanced tests ?

[Arsnael]

Read it nothing to add

[florentos17]

i created a new implementation of MailboxNameExpression to find only the mailboxes that match the name without taking the case into account - it is almost identical to the existing ExactName except for the isExpressionMatch and includeChildren methods.
i added unit tests which are also extremely similar to those of ExactName: just a couple of extra tests to test various cases.