readthedocs build is failing

[rhajek]

Error from https://readthedocs.org/projects/influxdb-client/builds/14020671/

Running Sphinx v1.8.5

Traceback (most recent call last):
  File "/home/docs/checkouts/readthedocs.org/user_builds/influxdb-client/envs/latest/lib/python3.6/site-packages/sphinx/config.py", line 368, in eval_config_file
    execfile_(filename, namespace)
  File "/home/docs/checkouts/readthedocs.org/user_builds/influxdb-client/envs/latest/lib/python3.6/site-packages/sphinx/util/pycompat.py", line 150, in execfile_
    exec_(code, _globals)
  File "/home/docs/checkouts/readthedocs.org/user_builds/influxdb-client/checkouts/latest/docs/conf.py", line 26, in <module>
    exec('\n'.join(l for l in f if l.startswith('__')), meta)
  File "<string>", line 1, in <module>
NameError: name 'CLIENT_VERSION' is not defined

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/docs/checkouts/readthedocs.org/user_builds/influxdb-client/envs/latest/lib/python3.6/site-packages/sphinx/cmd/build.py", line 303, in build_main
    args.tags, args.verbosity, args.jobs, args.keep_going)
  File "/home/docs/checkouts/readthedocs.org/user_builds/influxdb-client/envs/latest/lib/python3.6/site-packages/sphinx/application.py", line 201, in __init__
    self.config = Config.read(self.confdir, confoverrides or {}, self.tags)
  File "/home/docs/checkouts/readthedocs.org/user_builds/influxdb-client/envs/latest/lib/python3.6/site-packages/sphinx/config.py", line 203, in read
    namespace = eval_config_file(filename, tags)
  File "/home/docs/checkouts/readthedocs.org/user_builds/influxdb-client/envs/latest/lib/python3.6/site-packages/sphinx/config.py", line 380, in eval_config_file
    raise ConfigError(msg % traceback.format_exc())
sphinx.errors.ConfigError: There is a programmable error in your configuration file:

Traceback (most recent call last):
  File "/home/docs/checkouts/readthedocs.org/user_builds/influxdb-client/envs/latest/lib/python3.6/site-packages/sphinx/config.py", line 368, in eval_config_file
    execfile_(filename, namespace)
  File "/home/docs/checkouts/readthedocs.org/user_builds/influxdb-client/envs/latest/lib/python3.6/site-packages/sphinx/util/pycompat.py", line 150, in execfile_
    exec_(code, _globals)
  File "/home/docs/checkouts/readthedocs.org/user_builds/influxdb-client/checkouts/latest/docs/conf.py", line 26, in <module>
    exec('\n'.join(l for l in f if l.startswith('__')), meta)
  File "<string>", line 1, in <module>
NameError: name 'CLIENT_VERSION' is not defined


Configuration error:
There is a programmable error in your configuration file:

Traceback (most recent call last):
  File "/home/docs/checkouts/readthedocs.org/user_builds/influxdb-client/envs/latest/lib/python3.6/site-packages/sphinx/config.py", line 368, in eval_config_file
    execfile_(filename, namespace)
  File "/home/docs/checkouts/readthedocs.org/user_builds/influxdb-client/envs/latest/lib/python3.6/site-packages/sphinx/util/pycompat.py", line 150, in execfile_
    exec_(code, _globals)
  File "/home/docs/checkouts/readthedocs.org/user_builds/influxdb-client/checkouts/latest/docs/conf.py", line 26, in <module>
    exec('\n'.join(l for l in f if l.startswith('__')), meta)
  File "<string>", line 1, in <module>
NameError: name 'CLIENT_VERSION' is not defined
Command time: 0s Return: 2