Add support for maven-bundle-plugin:2.5.0

The Tycho project configurator fails to correctly update project config when the project uses the latest maven-bundle-plugin 2.5.0, because there are assumptions that the number of mojoexecutions will be 1 and with 2.5.0 there are 2.  

See https://github.com/bndtools/bndtools/issues/873

So this proposed fix simply loosens that logic and allows 1 or more, and continues to configure the project.  Also added a unit test along with lots of new repo binaries to get the tests to pass.