Remove SystemProperty tag as it is not supported in JDK8 #8

Job	Run time
Prerequisites	1m 20s
macOS x64 (build release)	7m 58s
Linux additional (hs x64 build only)	8m 0s
macOS x64 (build debug)	7m 59s
Linux x86 (build release)	7m 59s
Linux x64 (build release)	7m 57s
Linux additional (hs x64 zero build only)	5m 39s
Linux x86 (build debug)	8m 1s
Linux x64 (build debug)	8m 0s
Linux additional (hs x86 minimal build only)	4m 55s
Windows x64 (build release)	7m 46s
Linux additional (hs x86 client build only)	7m 43s
Windows x86 (build release)	7m 56s
Windows x64 (build debug)	7m 51s
Linux additional (hs aarch64 build only)	8m 2s
Windows x86 (build debug)	7m 56s
Linux additional (hs arm build only)	8m 2s
Linux additional (hs s390x build only)	8m 2s
Linux additional (hs ppc64le build only)	8m 1s
Windows x64	1s
Windows x86	1s
Linux x86	1s
Linux x64	1s
macOS x64	1s
Post-process artifacts	12s
	2h 19m 24s

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