Move pip requirements.txt to more canonical location

.travis.yml

@@ -149,7 +149,7 @@ env:
 before_install:
   # Need to install python modules before using 
   # python
-  - pip install -r config/python_requirements.txt
+  - pip install -r requirements.txt
 
   # Configure Travis-CI build environment for TFB
   #   e.g. setup databases, users, etc

deployment/vagrant-common/bootstrap.sh

@@ -122,7 +122,7 @@ if [ ! -e "~/.firstboot" ]; then
     echo "Cloning project from $GH_REPO $GH_BRANCH"
     git clone -b ${GH_BRANCH} https://github.com/${GH_REPO}.git $FWROOT
   fi
-  sudo pip install -r $FWROOT/config/python_requirements.txt
+  sudo pip install -r $FWROOT/requirements.txt
 
   # Everyone gets SSH access to localhost
   echo "Setting up SSH access to localhost"