Move private APIs to private namespace

Fixes #2078

lib/jasmine-core/jasmine-html.js

@@ -26,7 +26,7 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 var jasmineRequire = window.jasmineRequire || require('./jasmine.js');
 
 jasmineRequire.html = function(j$) {
-  j$.ResultsNode = jasmineRequire.ResultsNode();
+  j$.private.ResultsNode = jasmineRequire.ResultsNode();
   j$.HtmlReporter = jasmineRequire.HtmlReporter(j$);
   j$.QueryString = jasmineRequire.QueryString();
   j$.HtmlSpecFilter = jasmineRequire.HtmlSpecFilter();
@@ -35,7 +35,7 @@ jasmineRequire.html = function(j$) {
 
 jasmineRequire.HtmlReporter = function(j$) {
   function ResultsStateBuilder() {
-    this.topResults = new j$.ResultsNode({}, '', null);
+    this.topResults = new j$.private.ResultsNode({}, '', null);
     this.currentParent = this.topResults;
     this.specsExecuted = 0;
     this.failureCount = 0;
@@ -793,7 +793,7 @@ jasmineRequire.HtmlReporter = function(j$) {
       const el = createElement(type);
       let children;
 
-      if (j$.isArray_(childrenArrayOrVarArgs)) {
+      if (j$.private.isArray(childrenArrayOrVarArgs)) {
         children = childrenArrayOrVarArgs;
       } else {
         children = [];