Upgrade to GSF 3.08

[lmarsden]

gsfpy is currently based on GSF 3.06. The latest version of the GSF library is 3.09 (https://s3.amazonaws.com/leidos-com-static/software/other/GSF_03-09.zip). Bring gsfpy up to date.

Recommended approach:
Rebuild the shared object library (currently libgsf3_06.so) using the instructions provided for building the library in the MS Teams wiki (see #11). Run regression tests and fix any failures. Version 3.09 of GSF is not thought to introduce any breaking changes so no changes to Python code are expected to be necessary.

ACs

• libgsf3_06.so is replaced with a new shared object library named libgsf3_09.so built from version 3.09 of the Generic Sensor Format library.
• All existing unit tests pass with the new shared object library.