Use latest pyparsing 2.0.x to avoid setuptools entanglement

With 2.0.1, and setuptools 34.0.2, errors happen like:

File "/edx/app/edxapp/venvs/edxapp-sandbox/local/lib/python2.7/site-packages/packaging/requirements.py", line 59, in <module>
    MARKER_EXPR = originalTextFor(MARKER_EXPR())("marker")
TypeError: __call__() takes exactly 2 arguments (1 given)

(cherry picked from commit 73519b3547359a0b791e39d4665f51ac66449a17)

common/lib/calc/setup.py

@@ -5,7 +5,7 @@ setup(
     version="0.2",
     packages=["calc"],
     install_requires=[
-        "pyparsing==2.0.1",
+        "pyparsing==2.0.7",
         "numpy==1.6.2",
         "scipy==0.14.0",
     ],

common/lib/chem/setup.py

@@ -5,7 +5,7 @@ setup(
     version="0.1.1",
     packages=["chem"],
     install_requires=[
-        "pyparsing==2.0.1",
+        "pyparsing==2.0.7",
         "numpy==1.6.2",
         "scipy==0.14.0",
         "nltk==2.0.6",

requirements/edx-sandbox/base.txt

@@ -7,7 +7,7 @@
 numpy==1.6.2
 networkx==1.7
 sympy==0.7.1
-pyparsing==2.0.1
+pyparsing==2.0.7
 matplotlib==1.3.1
 
 # We forked NLTK just to make it work with setuptools instead of distribute

requirements/edx/base.txt

@@ -81,7 +81,7 @@ pygments==2.0.1
 pygraphviz==1.1
 PyJWT==1.4.0
 pymongo==2.9.1
-pyparsing==2.0.1
+pyparsing==2.0.7
 python-memcached==1.48
 python-openid==2.2.5
 python-dateutil==2.1