Avoid distributionManagement (outdated)
Split out jai-imageio-jpeg2000 from jai-imageio-core

Due to licensing issues.

See
https://github.com/stain/jai-imageio-core/issues/4
stain/jai-imageio-core#4
stain/jai-imageio-jpeg2000
https://github.com/stain/jai-imageio-jpeg2000