slorj -> httpclient 4, but we already have httpclient 3 in use

[Clemens Wyss DEV]

I doing initial steps with solrj which is based on httpclient 4. Unfortunately 
parts of our framework are based on httpclient 3. 
So when I instantiate an HttpSolrServer I run into:

java.lang.VerifyError: Cannot inherit from final class
...
        at 
org.apache.http.impl.client.DefaultHttpClient.createHttpParams(DefaultHttpClient.java:157)
        at 
org.apache.http.impl.client.AbstractHttpClient.getParams(AbstractHttpClient.java:447)
        at 
org.apache.solr.client.solrj.impl.HttpClientUtil.setFollowRedirects(HttpClientUtil.java:255)
...

Can these be run side-by-side at all?