Revisit the strategy about DataStore OpenOptions: move them as options given to StorageConnector, because we need
to know them when the ByteChannel is created (having the options in DataStoreProvider.canOpen(...) was too late).
As a side effect, the OpenOption are not anymore directly in the method signature, which will make the port to
the JDK6 branch a little bit easier.


git-svn-id: https://svn.apache.org/repos/asf/sis/branches/JDK7@1509300 13f79535-47bb-0310-9956-ffa450edef68