Forces to use sources compatible with java8 and runtime java 11 (#17194)
Forces to use sources compatible with java8 and runtime java 11 (#17194)

Signed-off-by: Sergii Kabashniuk <29c0f357da1539d701cf38481baf17db5d000cda@redhat.com>
codenvy/che,codenvy/che,codenvy/che,codenvy/che