Small fix in assert statement in test_rosette_api.py

Author: fhasanaj28

docker/Dockerfile

@@ -13,6 +13,7 @@ ENTRYPOINT ["/tini", "--"]
 RUN apt-get update && \
     	apt-get -y install \
         wget \
+        curl \
         libssl-dev \
         libffi-dev \
         python-pip \

tests/test_rosette_api.py

@@ -179,7 +179,7 @@ def test_responseHeaders():
                                body=body, status=200, content_type="application/json")
     test = RosetteTest("eng-doc-entities")
     result = test.api.entities(test.params)
-    assert ("responseHeaders" in result) == True
+    assert "responseHeaders" in result
 
 
 @httpretty.activate