first (naive) pass at beforeAll/afterAll

src/core/Spec.js

@@ -105,6 +105,10 @@ getJasmineRequireObj().Spec = function(j$) {
     }
   };
 
+  Spec.prototype.isExecutable = function() {
+    return !this.disabled && !this.markedPending;
+  };
+
   Spec.prototype.getFullName = function() {
     return this.getSpecName(this);
   };