asset-mgmt: strip jar: prefix from url that is present when running in tomcat during deployment of guvnor-asset-mgmt-project

(cherry picked from commit f3e5200e6bce5c56148dc242b09f88ee29473731)
removed leftovers after solder removal

(cherry picked from commit d489bbd811f6f2954ed796561e9ab5c8db507d9d)
JBPM-4496 - Add functionality to re-schedule async jobs that resulted in an error

(cherry picked from commit 71eb1e8ebf4888603454ab696aaf06c98c715f32)