Use mininum jdkSourceLevel of 1.7 for JDK 12+

[aguibert]

In JDK 12, the minimum supported source target level is JDK 1.7. Normally, the JSP Engine defaults to the lowest (JDK 1.3), so we need to default to JDK 1.7 on JDK 12+.

[LibbyBot]

Code analysis and actions

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• 11 product code files were changed.
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[aguibert]

#build #spawnfullfat com.ibm.ws.jsp_fat_lWAS

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[aguibert]

link to java 12 build: https://wasrtc.hursley.ibm.com:9443/jazz/resource/itemOid/com.ibm.team.build.BuildResult/_hvdt0FvtEem8NdNdaSGUMw

[aguibert]

#build #spawn.fullfat.buckets=com.ibm.ws.jsp_fat,com.ibm.ws.jsp_fat_jsp.2.3.toleration,com.ibm.ws.jsp_fat_lWAS

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[aguibert]

the java 11 and java 12 builds are good. Will deliver once code review is complete

[epj]

Any reason not to default to 1.7 in all cases, not just for Java 12? That's what's proposed in issue #7181.

[epj]

This change as such just for Java 12 looks good. We can debate if jskSourceLevel should default to 17 for all cases.