Disable inconsistent return type check

In this case, if major version is not returned from the block, the
function will never return but fail - so the check is not correct.

tests/integration/test_validate_spark_environment.py

@@ -34,6 +34,7 @@ def __extract_version_line(java_version_output: str) -> str:
     return version_line
 
 
+# pylint: disable=R1710
 def __parse_major_version(version_line: str) -> int:
     version_regex = re.compile(r'version "(?P<major>\d+)\.(?P<minor>\d+)\.\w+"')
     match = version_regex.search(version_line)