Bumped edx-enterprise version and added cornerstone app

lms/envs/common.py

@@ -2888,6 +2888,7 @@ OPTIONAL_APPS = [
     ('integrated_channels.integrated_channel', None),
     ('integrated_channels.degreed', None),
     ('integrated_channels.sap_success_factors', None),
+    ('integrated_channels.cornerstone', None),
     ('integrated_channels.xapi', None),
 
     # Required by the Enterprise App

requirements/edx/base.txt

@@ -104,7 +104,7 @@ edx-django-release-util==0.3.1
 edx-django-sites-extensions==2.3.1
 edx-django-utils==1.0.3
 edx-drf-extensions==2.2.1
-edx-enterprise==1.5.9
+edx-enterprise==1.6.0
 edx-i18n-tools==0.4.8
 edx-milestones==0.1.13
 edx-oauth2-provider==1.2.2

requirements/edx/development.txt

@@ -123,7 +123,7 @@ edx-django-release-util==0.3.1
 edx-django-sites-extensions==2.3.1
 edx-django-utils==1.0.3
 edx-drf-extensions==2.2.1
-edx-enterprise==1.5.9
+edx-enterprise==1.6.0
 edx-i18n-tools==0.4.8
 edx-lint==1.2.1
 edx-milestones==0.1.13

requirements/edx/testing.txt

@@ -119,7 +119,7 @@ edx-django-release-util==0.3.1
 edx-django-sites-extensions==2.3.1
 edx-django-utils==1.0.3
 edx-drf-extensions==2.2.1
-edx-enterprise==1.5.9
+edx-enterprise==1.6.0
 edx-i18n-tools==0.4.8
 edx-lint==1.2.1
 edx-milestones==0.1.13