Add more informations in case of connection problems

[rscadrde]

When some error occurs more details are helpful:

.api-httpListenerConfig.worker.01     ERROR
c883a0b0f73f11e8a8ed062f10c89c5a 
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Message               : Failed to invoke getFile.
Payload               : 24675068
Payload Type          : java.math.BigDecimal
Element               : /getBinaryContent/processors/3 @ picture-accessor-deve
Element XML           : <flow-ref name="getBinaryContent" doc:name="getBinaryContent"></flow-ref>
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Root Exception stack trace:
java.net.NoRouteToHostException: No route to host (Host unreachable)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at java.net.Socket.connect(Socket.java:538)
	at java.net.Socket.<init>(Socket.java:434)
	at java.net.Socket.<init>(Socket.java:211)
	at com.jcraft.jsch.Util$1.run(Util.java:362)
	at java.lang.Thread.run(Thread.java:748)

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