servers: libxtreemfs for Java: Pass maxTries params to syncCall if set.
servers: views: Restrict XLocSetRenewal retries to 1.
servers: libxtreemfs for Java: Add getDefaultReplicationPolicy() to
Volume.
servers: Add central method to check if a file operation requires any
coordination.
libxtreemfs for Java: Refactor xLocSet renewal for simpler concurrency handling.
client: Add a xLocSetHandler to deal with INVALID_VIEW errors.
client: Renew XLocSet on INVALID_VIEW errors.
client: Refresh UUID iterator when a new xLocSet is set.
libxtreemfs: Refactor XLocSet renewals on RPC calls.
servers: Fix some errors and remove discussed Todos
client: Add pointer ownership information.
interface: views: Add modified time to XLocSetVersionState.
servers: views: Save modified time to XLocSetVersionState.
interface: views: Use protobuf enum for check_file_exists responses.
servers: views: Adjust operations to interface changes.
servers: Refactor DeleteVolumeOperation and ensure the db changes are made from the primary thread.
servers: Refactor CleanupThread and adapt to metaOnlyDirectories.
servers: views: Delete Metadata only if explicitly requested.
interface: Add removeMetadata argument to cleanup_start.
servers, utils: Adapt to previous interface changes and allow to control the removal of metadata at the CleanupThread.