[Bug]: SolaceIO.Read: clients are not properly closed.

[bzablocki]

What happened?

When reading from Solace, especially with DirectRunner which by-design closes randomly UnboundedReaders, some of the connections were not properly closed.
A way to fix it is to explicitly close the FlowReceivers created from JcsmpSession objects, instead of closing only the JcsmpSession objects.

Issue Priority

Priority: 2 (default / most bugs should be filed as P2)

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[bzablocki]

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