Fixed tycho repo reference in pom
Fixed tycho repo reference in pom

The pom was trying to resolve tycho-repo.url, but the variable was
actually stored as maven-repo.url, preventing the plugins from being
resolved.

Signed-off-by: Robert Smith <22c25089779475e35eafae66ad8a8e3c15f3fa55@ornl.gov>
eclipse/ice,eclipse/ice,eclipse/ice,eclipse/ice,eclipse/ice,eclipse/ice