8157957: ClassNotFoundException: jdk.test.lib.JDKToolFinder
Reviewed-by: coleenp, gtriantafill, mseledtsov, iignatyev, dholmes, dsamersoff

8144578: TestOptionsWithRanges test only ever uses the default collector
Reviewed-by: sangheki, dholmes

8142874: [TESTBUG] OptionsValidation testing framework needs to handle VM error codes in some cases
Reviewed-by: gtriantafill, stsmirno, ctornqvi, gziemski

8142341: GC: current flags need ranges to be implemented
Summary: Add explicit ranges and constraint for all gc flags
Reviewed-by: jwilhelm, gziemski, ddmitriev, tbenson

8138983: Runtime: implement ranges for Shared*** flags
Summary: Implement ranges.
Reviewed-by: ddmitriev, dholmes, jiangli

8139900: [TESTBUG] Remove G1UpdateBufferSize and InitialBootClassLoaderMetaspaceSize from TestOptionsWithRanges
Reviewed-by: gziemski, sangheki, ctornqvi

8072931: JEP-JDK-8059557: Test task: test framework development
Summary: Test set for JEP 245 Validate JVM Command-Line Flag Arguments
Reviewed-by: ctornqvi, dholmes, gziemski