Upgraded bok-choy and Selenium

LEARNER-509

e2e/requirements.txt

 # Packages required to run e2e tests
-bok-choy==0.6.2
+bok-choy==0.7.0
 ddt==1.1.1
 django-nose==1.4.4
 edx-rest-api-client==1.7.1
 nose-ignore-docstring==0.2
-selenium>=3.0.2
+selenium==3.4.2

package.json

@@ -25,7 +25,7 @@
     "karma-requirejs": "1.1.0",
     "karma-sinon": "1.0.5",
     "karma-spec-reporter": "0.0.26",
-    "phantomjs": "2.1.7",
+    "phantomjs-prebuilt": "2.1.14",
     "sinon": "1.17.7"
   }
 }

requirements/test.txt

 # Packages required for testing
 -r base.txt
 
-bok-choy==0.6.2
+bok-choy==0.7.0
 coverage==4.3.4
 ddt==1.1.1
 django-nose==1.4.4
@@ -14,6 +14,6 @@ mock-django==0.6.9
 nose-ignore-docstring==0.2
 pep8==1.6.2
 pylint==1.6.4
-selenium>=3.0.1
+selenium==3.4.2
 testfixtures==4.5.0
 diff-cover==0.9.6