Fix for https://bugs.eclipse.org/bugs/show_bug.cgi?id=149224.

When adding a ['foo'] style property in a content assist,the proposal strategy now checks to see if the preceding char is a '.' and if so, it will replace it as part of the proposal if that proposal is selected by the user.

Regression test coverage also added.

Also made a small thread sync change in JSPModelProcessor to fix a possible race condition in refresh().
diff --git a/jsf/tests/org.eclipse.jst.jsf.contentassist.tests/testdata/bug_149224_1.jsp.data b/jsf/tests/org.eclipse.jst.jsf.contentassist.tests/testdata/bug_149224_1.jsp.data
new file mode 100644
index 0000000..aba64ef
--- /dev/null
+++ b/jsf/tests/org.eclipse.jst.jsf.contentassist.tests/testdata/bug_149224_1.jsp.data
@@ -0,0 +1,25 @@
+<%@page contentType="text/html"%>
+<%@page pageEncoding="UTF-8"%>
+
+<%@taglib uri="http://java.sun.com/jsf/core" prefix="f"%>
+<%@taglib uri="http://java.sun.com/jsf/html" prefix="h"%>
+
+
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
+   "http://www.w3.org/TR/html4/loose.dtd">
+
+<html>
+  <head>
+  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+        <title>JSP Page</title>
+    </head>
+    <body>
+    <f:view>
+    <f:loadBundle basename="bundles.bundle1" var="bundle1"/>
+    <h1>JSP Page</h1>
+    	<!--  no errors -->
+    	<h:outputText value="#{bundle1.}"/>
+    	<h:outputText value="#{bundle1.x}"/>
+    </f:view>
+    </body>
+</html>