Make scripts executable #536

Job	Run time
Model Difference (apache/commons-fileupload)	3m 11s
Model Difference (apache/commons-codec)	3m 27s
Model Difference (apache/commons-validator)	3m 23s
Model Difference (apache/commons-csv)	3m 12s
Model Difference (apache/commons-lang)	3m 46s
Model Difference (apache/commons-beanutils)	3m 26s
Model Difference (apache/dubbo)	5m 56s
Model Difference (apache/commons-io)	3m 42s
Model Difference (apache/commons-logging)	3m 4s
	33m 7s

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