marked Apache HttpComponents dependency as optional (SPR-8788); cleanup of conversation dependencies

Author: jhoeller

org.springframework.web/template.mf

@@ -22,14 +22,12 @@ Import-Template:
  org.apache.commons.fileupload.*;version="[1.2.0, 2.0.0)";resolution:=optional, 
  org.apache.commons.httpclient.*;version="[3.1.0, 4.0.0)";resolution:=optional,
  org.apache.commons.logging.*;version="[1.1.1, 2.0.0)",
- org.apache.http.*;version="[4.1, 5.0.0)",
+ org.apache.http.*;version="[4.1.0, 5.0.0)";resolution:=optional,
  org.apache.log4j.*;version="[1.2.15, 2.0.0)";resolution:=optional,
  org.springframework.aop.*;version=${spring.osgi.range},
  org.springframework.beans.*;version=${spring.osgi.range},
  org.springframework.context.*;version=${spring.osgi.range},
  org.springframework.core.*;version=${spring.osgi.range},
- org.springframework.conversation.*;version=${spring.osgi.range},
- org.springframework.web.conversation.*;version=${spring.osgi.range},
  org.springframework.jndi.*;version=${spring.osgi.range};resolution:=optional,
  org.springframework.oxm.*;version=${spring.osgi.range};resolution:=optional,
  org.springframework.remoting.*;version=${spring.osgi.range};resolution:=optional,