...

sed -i -e 's/"1\.5"/"1.7"/g' conf/build.xml

Symlink the database driver:

...

No errors should be reported in the end.

User interface

Compile the app:

This sits in /grouper-ui of the repository. 

First change the version statement to 1.7:

cd /opt/GROUPER_2_1_1/grouper-ui
sed -i -e 's/"1\.5"/"1.7"/g' build.xml

Compile the app:

ant dist

Create a file /etc/tomcat7/Catalina/localhost/grouper-ui.xml with this content:

...