kafka-python: Fixed crc32c avilability on non-intel architectures. (#1904)

Signed-off-by: ossdev <[email protected]>

Author: ossdev07

requirements-dev.txt

@@ -12,5 +12,5 @@ pylint==1.9.3
 pytest-pylint==0.12.3
 pytest-mock==1.10.0
 sphinx-rtd-theme==0.2.4
-crc32c==1.5
+crc32c==1.7
 py==1.8.0

tox.ini

@@ -23,6 +23,7 @@ deps =
 commands =
     py.test {posargs:--pylint --pylint-rcfile=pylint.rc --pylint-error-types=EF --cov=kafka --cov-config=.covrc}
 setenv =
+    CRC32C_SW_MODE = auto
     PROJECT_ROOT = {toxinidir}
 passenv = KAFKA_VERSION