set pac4j session store in application context (#226)

Co-authored-by: Patel, Saurabh <[email protected]>

Author: AFine-gs

legend-shared-pac4j/src/main/java/org/finos/legend/server/pac4j/LegendPac4jBundle.java

@@ -270,6 +270,8 @@ protected void handleMapping(FilterMapping mapping)
                                 mapping.setDispatcherTypes(EnumSet.allOf(DispatcherType.class));
                             }
                         });
+        environment.getApplicationContext()
+                        .setAttribute("PAC4J_SESSION_STORE",this.getConfig().getSessionStore());
         swapClientFinderAndStorageDecision(environment);
     }