Revision 1819730

Improved: Handle service response effectively
(OFBIZ-9981)

As per discussion on Dev ML:
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Every service calling from java/groovy must handle errors by service util 
methods such as isError, returnError etc. 
and similarly in case of XML <call-service, there should be <check-error/> 
to make sure service was executed successfully.

Apart from this, one suggestion is to include *Debug.logError* in 
*ServiceUtil.returnProblem* so that in case of any error occurred and handled, 
it will always be logged on the console.
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jleroux: this is the applications part with some slight changes

Thanks: Suraj Khurana and Anushi Gupta