Addressbook: Add tests for Daemon to read local subscription file

...addressbook/java/src/net/i2p/addressbook/AddressBook.java

apps/addressbook/java/src/net/i2p/addressbook/Daemon.java

...ddressbook/java/src/net/i2p/addressbook/HostTxtEntry.java

...ok/java/src/net/i2p/addressbook/SubscriptionIterator.java

...ssbook/java/src/net/i2p/addressbook/SubscriptionList.java