Fix setup script for databuilder repo (#127)

setup.py

+import os
 from setuptools import setup, find_packages
 
 
-__version__ = '1.4.0'
+__version__ = '1.4.1'
 
 
+requirements_path = os.path.join(os.path.dirname(os.path.realpath(__file__)), 'requirements.txt')
+with open(requirements_path) as requirements_file:
+    requirements = requirements_file.readlines()
+
 setup(
     name='amundsen-databuilder',
     version=__version__,
@@ -13,30 +18,7 @@ setup(
     maintainer_email='dev@lyft.com',
     packages=find_packages(exclude=['tests*']),
     dependency_links=[],
-    install_requires=[
-        # Packages in here should rarely be pinned. This is because these
-        # packages (at the specified version) are required for project
-        # consuming this library. By pinning to a specific version you are the
-        # number of projects that can consume this or forcing them to
-        # upgrade/downgrade any dependencies pinned here in their project.
-        #
-        # Generally packages listed here are pinned to a major version range.
-        #
-        # e.g.
-        # Python FooBar package for foobaring
-        # pyfoobar>=1.0, <2.0
-        #
-        # This will allow for any consuming projects to use this library as
-        # long as they have a version of pyfoobar equal to or greater than 1.x
-        # and less than 2.x installed.
-        'pyhocon==0.3.42',
-        'pytest==3.6.0',
-        'six',
-        'neo4j-driver==1.7.2',
-        'antlr4-python2-runtime==4.7.1',
-        'statsd==3.2.1',
-        'retrying==1.3.3',
-    ],
+    install_requires=requirements,
     extras_require={
         ':python_version=="2.7"': ['typing>=3.6'],  # allow typehinting PY2
         'kafka': ['confluent-kafka==1.0.0'],  # To use with Kafka source extractor