[BZ-1077105] do not dispose an old KieSession when a new one with same name is created from the KieContainer
(cherry picked from commit 67efda270f4ca164bafe7ef26323374cef081196)
[BZ-1077105] if the current KieSession has been disposed make the KieContainer.getKieSession method to create a new one
(cherry picked from commit f761d553a5ccd582fc976ffa46f494af32cccc37)