Fix extra space typo.

git-svn-id: https://svn.apache.org/repos/asf/httpcomponents/httpcore/branches/4.4.x@1740182 13f79535-47bb-0310-9956-ffa450edef68

Author: garydgregory

httpcore-osgi/pom.xml

@@ -68,7 +68,7 @@
           <version>${pax.exam.version}</version>
           <exclusions>
               <exclusion>
-                  <groupId> org.osgi</groupId>
+                  <groupId>org.osgi</groupId>
                   <artifactId>org.osgi.core</artifactId>
               </exclusion>
           </exclusions>