ObjectHelper - newInstance - minor bug with not wrapping correct caused exception

[Claus Ibsen]

Hi

I will commit a minor fix for ObjectHelper that hides the orginal cause 
exception when instantiating a new class, eg using the bean type, such as:
                
from("seda:errorTest").to("mock:a").bean(MyBadBean.class).to("mock:b");



Before:
=======
org.apache.camel.RuntimeCamelException
        at org.apache.camel.util.ObjectHelper.newInstance(ObjectHelper.java:607)

After:
=======
org.apache.camel.RuntimeCamelException: java.lang.InstantiationException: 
org.apache.camel.issues.BelasThreadErrorHandlerIssue901Test$MyBadBean
        at org.apache.camel.util.ObjectHelper.newInstance(ObjectHelper.java:607)




Med venlig hilsen

Claus Ibsen
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