When lz4 compression is enabled and the H5Z_FLAG_OPTIONAL flag is set
compression is abborted and an error returned when the size of output
stream exceeds the size of the input stream in bytes. This is the
behaviour for compression filters recommended by the libhdf5
documentation for the HZ5_FLAG_OPTIONAL.

Added compiletime macros allowing fast abort in single threaded mode and
when compiled with omp support. In the latter case it is ensured that
no futher chunk is shuffled and compressed after abort has been
signalled by any of the threads. The actual abort occurs as soon as all
workers have safely cleared their queue.

Missing calls to  ioc_destroy in case of error by bshuf_blocked_wrap_fun
========================================================================
ioc_destroy function was only called on return when bshuf_bloced_wrap_fun
finished successfully. In any error case just the error coded was
returned but the ioc_pipipine was not released. In single threaded mode
this does not have any effect as ioc_destroy is a noop which is very
likely removed during call site optimization step. But when compiling
with omp enabled than it is responsible that all synchonization barriers
and locks are properly released again. Which was not the case when
bshuf_blocked_wrap_fun aborted returning an error code.

Added Compile time macros for tearing down ioc before returning error
code.
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not able to run tests cause of some errors need help figuring and fix

…r.py