Implement RepoCommand.Project.hashCode() since we override equals()

Bug: 440757
Change-Id: I16614c75b62b2fbef05419dd8667e3c50889abe4
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

org.eclipse.jgit/src/org/eclipse/jgit/gitrepo/RepoCommand.java

 			return false;
 		}
 
+		@Override
+		public int hashCode() {
+			return this.getPathWithSlash().hashCode();
+		}
+
 		public int compareTo(Project that) {
 			return this.getPathWithSlash().compareTo(that.getPathWithSlash());
 		}