Fix maven compilation error related to server.home variable defined in filter and which does not need to be declared in the pom.xml

Use mvn clean install -DskipTests -Penv-brgm to compile depending on the target platform.

See https://github.com/geosource-catalogue/core-geonetwork/commit/072eaf7e2e5724ca59296d075ed5c35ca610147e#diff-eef89535a29b4a95a42d9de83cb53681R863