Fix misleading error message when gradle is present but jdk9 is not #425
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Currently when
esrally configure
is run, the gradle binary path ispersisted to rally.ini only if jdk9 is also installed. However, when
esrally
is run in benchmark_from_source mode (e.g., no args provided),the gradle binary path in rally.ini is referenced before any jdk9 checks
take place -- leading to the following message:
No value for mandatory configuration: section=build, key=gradle.bin
This commit persists the gradle binary path to rally.ini whenever it exists,
allowing existing logic around jdk9 to emit a sensible error.
Fixes #423