[BUILD] Add test-jar goal to pom.xml
[BUILD] Add test-jar goal to pom.xml

S4J includes nice helper methods for randomized spatial testing. These helper methods should be used/extended in derivitive spatial test suites to ensure consistency with s4j's core logic.  This commit adds the test-jar goal to the s4j pom to build a spatial4j-M.m.r-tests.jar for inclusion in the maven repository

Signed-off-by: Nicholas Knize <a9feab4c43c307364f4cf9dd9959bbfa8385ecbd@gmail.com>

jdeolive/spatial4j,jdeolive/spatial4j