create buildspecs for projects that define Reproducible Builds timestamp in their Maven build

[hboutemy]

here are some POMs in Central Repository to be investigated:
https://repo.maven.apache.org/maven2/com/github/kokorin/jaffree/jaffree/2021.05.26/jaffree-2021.05.26.pom
https://repo.maven.apache.org/maven2/com/hedera/hashgraph/hedera-services/0.9.0/hedera-services-0.9.0.pom
https://repo.maven.apache.org/maven2/com/ongres/stringprep/parent/2.0/parent-2.0.pom
https://repo.maven.apache.org/maven2/com/samboom/samboom/1/samboom-1.pom
https://repo.maven.apache.org/maven2/com/io7m/primogenitor/com.io7m.primogenitor/6.0.0/com.io7m.primogenitor-6.0.0.pom
https://repo.maven.apache.org/maven2/com/vegardit/maven/vegardit-maven-parent/2.4.30/vegardit-maven-parent-2.4.30.pom
https://repo.maven.apache.org/maven2/de/syquel/maven/reactorstate/reactorstate-maven-project/1.0.0-alpha.0/reactorstate-maven-project-1.0.0-alpha.0.pom
https://repo.maven.apache.org/maven2/io/dwpbank/movewp3/microservice-security-autoconfiguration/0.6.0/microservice-security-autoconfiguration-0.6.0.pom
https://repo.maven.apache.org/maven2/org/alindner/cish/cish/v0.3.4-13/cish-v0.3.4-13.pom
https://repo.maven.apache.org/maven2/wtf/metio/reguloj/reguloj/2021.4.14/reguloj-2021.4.14.pom
https://repo.maven.apache.org/maven2/wtf/metio/yosql/yosql/2021.4.18/yosql-2021.4.18.pom
https://repo.maven.apache.org/maven2/io/streamnative/connectors/pulsar-spark-connector_2.12/3.1.1.2/pulsar-spark-connector_2.12-3.1.1.2.pom
https://repo.maven.apache.org/maven2/org/apache/olingo/odata-parent/4.9.0/odata-parent-4.9.0.pom

each require a PR for corresponding buildspec