Client library: remove extraneous object store file seek restriction at the kfs client level, in order to allow to set position (seek) with object store files. Object store block write path now enforces sequential write with object store files.
Client library: remove extraneous object store file seek restriction at the kfs client level, in order to allow to set position (seek) with object store files. Object store block write path now enforces sequential write with object store files.

quantcast/qfs,quantcast/qfs,quantcast/qfs,quantcast/qfs,quantcast/qfs,quantcast/qfs,quantcast/qfs,quantcast/qfs