Update pom.xml

[copierrj]

Upgrade deegree maven plugin to version 2.0.2

[tfr42]

Running the build inside local Docker Container:

docker run --name travis-debug -dit travisci/ci-garnet:packer-1512502276-986baf0 /sbin/init
docker exec -it travis-debug bash -l

Then inside the docker container:

git clone --depth=50 --branch=master https://github.com/deegree/deegree3.git
git fetch origin +refs/pull/914/merge:
git checkout -qf FETCH_HEAD
export CASHER_DIR=${TRAVIS_HOME}/.casher
mvn install -Pintegration-tests -DskipTests=true -B -V

Build completed successfully! So, unable to reproduce the build issue on travis-ci.
Same on the Jenkins CI, with Maven 3.5.2 the build completed successfully: http://buildserver.deegree.org/job/deegree-3.4-master/159/console

[tfr42]

Root cause for the failing build seems to be the version range defined for the transitive dependency of net.postgis:postgis-jdbc:2.2.1, see https://repo1.maven.org/maven2/net/postgis/postgis-jdbc/2.2.1/postgis-jdbc-2.2.1.pom
Issue should be fixed with PR #932.

[copierrj]

Looks like we've still another build issue...