Only install the Python dependencies we need

There are a lot of Python dependencies being installed for the
emailservice that aren't being used, and not all of the dependencies for
the loadgenerator are pinned.

This allows us to only specify the top-level dependencies we care about
in the requirements.in files, which are then compiled to frozen
dependencies in the requirements.txt files.

src/emailservice/requirements.in

@@ -0,0 +1,6 @@
+google-api-core==1.6.0
+grpcio-health-checking==1.12.1
+grpcio==1.16.1
+jinja2==2.10
+opencensus[stackdriver]==0.1.10
+python-json-logger==0.1.9

src/emailservice/requirements.txt

@@ -1,41 +1,29 @@
-asn1crypto==0.24.0
-cachetools==2.1.0
-certifi==2018.8.24
-cffi==1.11.5
-chardet==3.0.4
-configparser==3.5.0
-cryptography==2.3.1
-entrypoints==0.2.3
-enum34==1.1.6
-futures==3.1.1
-google-api-core==1.6.0
-google-auth==1.6.1
-google-cloud-core==0.29.0
-googleapis-common-protos==1.5.3
-grpc-google-iam-v1==0.11.4
-grpcio==1.16.1
+#
+# This file is autogenerated by pip-compile
+# To update, run:
+#
+#    pip-compile --output-file requirements.txt requirements.in
+#
+cachetools==3.0.0         # via google-auth
+certifi==2018.11.29       # via requests
+chardet==3.0.4            # via requests
+google-api-core[grpc]==1.6.0
+google-auth==1.6.2        # via google-api-core
+google-cloud-core==0.29.1  # via google-cloud-trace
+google-cloud-trace==0.20.2  # via opencensus
+googleapis-common-protos==1.5.5  # via google-api-core
 grpcio-health-checking==1.12.1
-grpcio-tools==1.12.1
-idna==2.7
-ipaddress==1.0.22
-jeepney==0.4
-Jinja2==2.10
-keyring==15.1.0
-keyrings.alt==3.1
-MarkupSafe==1.0
+grpcio==1.16.1
+idna==2.8                 # via requests
+jinja2==2.10
+markupsafe==1.1.0         # via jinja2
 opencensus[stackdriver]==0.1.10
-protobuf==3.6.1
-pyasn1==0.4.4
-pyasn1-modules==0.2.2
-pycairo==1.17.1
-pycparser==2.19
-pycrypto==2.6.1
-PyGObject==3.30.1
+protobuf==3.6.1           # via google-api-core, googleapis-common-protos, grpcio-health-checking
+pyasn1-modules==0.2.3     # via google-auth
+pyasn1==0.4.5             # via pyasn1-modules, rsa
 python-json-logger==0.1.9
-pytz==2018.5
-pyxdg==0.26
-requests==2.20.0
-rsa==4.0
-SecretStorage==3.1.0
-six==1.11.0
-urllib3==1.23
+pytz==2018.9              # via google-api-core
+requests==2.21.0          # via google-api-core
+rsa==4.0                  # via google-auth
+six==1.12.0               # via google-api-core, google-auth, grpcio, protobuf
+urllib3==1.24.1           # via requests

src/loadgenerator/requirements.in

@@ -0,0 +1 @@
+locustio==0.8.1

src/loadgenerator/requirements.txt

@@ -1,2 +1,23 @@
+#
+# This file is autogenerated by pip-compile
+# To update, run:
+#
+#    pip-compile --output-file requirements.txt requirements.in
+#
+certifi==2018.11.29       # via requests
+chardet==3.0.4            # via requests
+click==7.0                # via flask
+flask==1.0.2              # via locustio
+gevent==1.4.0             # via locustio
+greenlet==0.4.15          # via gevent
+idna==2.8                 # via requests
+itsdangerous==1.1.0       # via flask
+jinja2==2.10              # via flask
 locustio==0.8.1
-pyzmq==17.0.0
+markupsafe==1.1.0         # via jinja2
+msgpack-python==0.5.6     # via locustio
+pyzmq==17.0.0             # via locustio
+requests==2.21.0          # via locustio
+six==1.12.0               # via locustio
+urllib3==1.24.1           # via requests
+werkzeug==0.14.1          # via flask