Prepare pom.xml for Deployment to Maven Central

[anddann]

This PR prepares the info-flow pom for deployment to Maven Central

• add pom.xml information: developer, repository, link to github
• change dependency versions to releases (as required by Maven Central)
• get rid of self-created "j2ee.jar" in bin folder

[mbenz89]

Looks good to me. Please fix the formatting.

@StevenArzt Note that with this configuration, the fat jar would be just built when the deploy profile is active. We do it like this for Soot since we expect our users to not require a fat jar if they want to build Soot themselves anyway.

[StevenArzt]

@mbenz89 I'd rather always build the fat JAR because many FlowDroid users are not Maven experts and I have received various questions on the build process since we switched to Maven. Therefore, I'd rather build more (and accept the extra disk space and build time) to keep it simple for users.

[anddann]

The original assembly-plugin configuration is still contained in the default build configuration.
When someone runs mvn -DskipTests install the same jar files are generated as before this PR.
That said, IMHO there is no impact on the previous default Maven build config.