update Pip release on spark 2.4.3 (#3093)

Author: Le-Zheng

pyspark/setup.py

@@ -90,7 +90,7 @@ def setup_package():
         url='https://github.com/intel-analytics/Bigdl',
         packages=get_bigdl_packages(),
         install_requires=['numpy>=1.7', 'pyspark==2.4.3', 'six>=1.10.0'],
-        dependency_links=['https://archive.apache.org/dist/spark/spark-3.0.0/spark-3.0.0-bin-hadoop2.7.tgz'],
+        dependency_links=['https://d3kbcqa49mib13.cloudfront.net/spark-2.0.0-bin-hadoop2.7.tgz'],
         include_package_data=True,
         package_data={"bigdl.share": ['bigdl/share/lib', 'bigdl/share/conf', 'bigdl/share/bin']},
         classifiers=[