LIBDRUM-152. Move local customizations for dspace to the addition module

1. Checkout entire tree for dspace-parent, dspace-api, dspace-jspui as original dspace-4.1 including pom.xmls
2. (1) Fixed indexing issue
3. Moved custom maven dependencies to the jspui, and additions.xml

https://issues.umd.edu/browse/LIBDRUM-152