Redesigned moudule system

* Top level private APIs (e.g. jasmine.private.whatever) are no longer
  exposed
* jasmineRequire is no longer exposed
* core is self-booting
* Globals are automatically created in browsers. (They can subsequently
  be removed by user code if desired.)
* Globals are *not* automatically created in Node. An installGlobals
  function is exported instead. The jasmine package calls installGlobals
  unless configured not to do so.
* In Node, the same instance is returned each time jasmine-core is
  imported. A reset function is exported. It effectively resets all state
  by discarding the env and creating a new one. This allows mulitple
  sequential runs within the same process to be independent of each
  other, but does not allow multiple concurrent runs. (That probably never
  worked anyway.)

Fixes #2094

spec/helpers/nodeDefineJasmineUnderTest.js

@@ -7,24 +7,29 @@
     '../../src/core/requireCore.js'
   ));
 
+  // Individual source files call getJasmineRequireObj. It's normally defined
+  // by requireCore.js which is concatenated into jasmine.js before other source
+  // files. Since we're bypassing that mechanism, we need to provide our own.
   global.getJasmineRequireObj = function() {
     return jasmineUnderTestRequire;
   };
 
-  function getSourceFiles() {
-    const globs = ['../../src/core/**/*.js', '../../src/version.js'];
-    const srcFiles = globs.flatMap(g => glob.sync(g, { cwd: __dirname }));
+  const srcFiles = [
+    ...glob.sync('../../src/core/**/*.js', {
+      ignore: '../../src/core/requireSuffix.js',
+      cwd: __dirname
+    }),
+    '../../src/version.js',
+    '../../src/core/requireCore.js'
+  ];
 
-    for (const file of srcFiles) {
-      require(file);
-    }
+  for (const file of srcFiles) {
+    require(file);
   }
 
-  getSourceFiles();
-  global.jasmineUnderTest = jasmineUnderTestRequire.core(
-    jasmineUnderTestRequire
-  );
+  delete global.getJasmineRequireObj;
 
-  // Alias the private namespace so tests can be less verbose
-  global.privateUnderTest = global.jasmineUnderTest.private;
+  const built = jasmineUnderTestRequire.core(jasmineUnderTestRequire);
+  global.jasmineUnderTest = built.jasmine;
+  global.privateUnderTest = built.private;
 })();