add toString to RuleEngineOption
(cherry picked from commit 636bf01b09a0139343b0d7f630101afc12b2514e)
Fix small javadoc typos and add missing license headers for kie-api
(cherry picked from commit 19072ffb8ab80b874ca08aaf5f40f8e6afa03b5d)
Add missing license headers in kie-internal
(cherry picked from commit d60574132d912f544a19b699f45704e0dd9a369b)
Added missing image file
(cherry picked from commit c544ca5b651a4b0e2e7b7f57662eb3275caa05d6)