git: openjdk/jmc: 6640: Run spotless and tests as part of the workflow

[duke]

Changeset: 93ab7cdb
Author:    Marcus Hirt <marcus at hirt.se>
Date:      2019-12-05 15:40:47 +0000
URL:       https://git.openjdk.java.net/jmc/commit/93ab7cdb

6640: Run spotless and tests as part of the workflow

+ .github/workflows/validate.yml
! .gitignore
! .jcheck/conf
+ scripts/checkformatting.bat
+ scripts/checkformatting.sh
+ scripts/runapptests.bat
+ scripts/runapptests.sh
+ scripts/runcoretests.bat
+ scripts/runcoretests.sh