Rendering with invalid inputFile is not handled correctly

[hmariann]

Pre-requisites:

• Java runtime 1.8

• placingToRendering.xml exists in the rendering-1.4.0.jar's folder and is a valid inputFile (produced by placing-1.4.0.jar with the mappingToPlacing.xml as input generated by mapping-1.4.0.jar with the cdfFile generated by converter-1.4.0.jar for the input codemetropolis-toolchain-commons.graph)

• command line opened in the folder of rendering-1.4.0.jar

Steps:

1. Open placingToRendering.xml with a text editor

2. Delete content from line 10 to 20 and save the file

3. Run "java -jar rendering-1.4.0.jar -i placingToRendering.xml -w cm"

Expected result:

The tool warns the user that the input file content is invalid and exits normally without creating the output file.

Test result:

	The tool halts with an error message saying "[Fatal Error] placingToRendering2.xml:2609:19: The element type "buildables" must be terminated by the matching end-tag "</buildables>". Error: Input XML is not in CMXML format.". The log file contains the following exception and stack trace: 
	logError
    SEVERE: Error: Input XML is not in CMXML format.

    codemetropolis.toolchain.commons.cmxml.exceptions.CmxmlValidationFailedException
        at codemetropolis.toolchain.rendering.RenderingExecutor.execute(RenderingExecutor.java:57)
        at codemetropolis.toolchain.rendering.Main.main(Main.java:73)

Related TC:

Current develop branch version
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