Uses cassandra-driver from /usr/share/cassandra/lib on systems with Cassandra installed

[mgmartian]

In cqlsh/cqlsh.py, there's this bit:

if platform.system() == 'Linux':
    ZIPLIB_DIRS.append('/usr/share/cassandra/lib')

On systems that have Cassandra installed, this causes cqlsh to use the cassandra-driver that was installed with the cassandra RPM in preference to the one included in the venv.

In our case, this causes a failure because the cassandra-driver included with Cassandra 3.11.15 in /usr/share/cassandra/lib is not compatible with Python 3.10.

$ cqlsh
Traceback (most recent call last):
  File "/some/venv/bin/cqlsh", line 5, in <module>
    from cqlsh.__main__ import main
  File "/some/venv/lib/python3.10/site-packages/cqlsh/__main__.py", line 3, in <module>
    from cqlsh.cqlsh import main as cqlsh_main
  File "/some/venv/lib/python3.10/site-packages/cqlsh/cqlsh.py", line 134, in <module>
    from cassandra.cluster import Cluster
  File "/usr/share/cassandra/lib/cassandra-driver-internal-only-3.11.0-bb96859b.zip/cassandra-driver-3.11.0-bb96859b/cassandra/cluster.py", line 22, in <module>
ImportError: cannot import name 'Mapping' from 'collections' (python3.10.13-cp310-cp310-manylinux2014_x86_64/squashfs-root/opt/python3.10/lib/python3.10/collections/__init__.py)
$ 

To get around this, we set CQLSH_NO_BUNDLED=1 which disables this behavior... but it seems like when repackaging cqlsh, you should comment out these two lines instead.

[mgmartian]

BTW: Thanks for repackaging cqlsh - we really appreciate this project!