Update spring-webmvc-portlet template.mf

Add Import-Template entry for org.spring-framework.jndi

Issue: SPR-8038

Author: cbeams

org.springframework.web.portlet/template.mf

@@ -12,6 +12,7 @@ Import-Template:
  org.springframework.context.*;version=${spring.osgi.range},
  org.springframework.core.*;version=${spring.osgi.range},
  org.springframework.http.*;version=${spring.osgi.range},
+ org.springframework.jndi.*;version=${spring.osgi.range},
  org.springframework.stereotype;version=${spring.osgi.range},
  org.springframework.ui.*;version=${spring.osgi.range},
  org.springframework.util.*;version=${spring.osgi.range},