[510682] Adds check for Dynamic Web facet before version check 

In the WebAnnotationReader.analyzeCompilationUnit function, there is a
check to see what version of the Dynamic Web facet is installed in a
project without checking to see if the facet is even installed. A simple
solution is to add a check to see if the facet is installed, before
checking the version, like what was done in
Web25MergedModelProvider.createWebMerger.

Signed-off-by: John Collier <John.J.Collier@ibm.com>

plugins/org.eclipse.jst.jee.web/web/org/eclipse/jst/jee/model/internal/WebAnnotationReader.java

diff --git a/plugins/org.eclipse.jst.jee.web/web/org/eclipse/jst/jee/model/internal/WebAnnotationReader.java b/plugins/org.eclipse.jst.jee.web/web/org/eclipse/jst/jee/model/internal/WebAnnotationReader.java
index 75908ad..204df13 100644
--- a/plugins/org.eclipse.jst.jee.web/web/org/eclipse/jst/jee/model/internal/WebAnnotationReader.java
+++ b/plugins/org.eclipse.jst.jee.web/web/org/eclipse/jst/jee/model/internal/WebAnnotationReader.java
@@ -141,9 +141,13 @@
 				return annotationFactory.createFilter(rootType, filter.getFilterName());
 			}
 		}
-		if(Float.parseFloat(facetedProject.getProjectFacetVersion(WebFacetUtils.WEB_FACET).getVersionString()) > 2.5){
-			return createJavaeeObject(rootType);	
+		
+		if (facetedProject.hasProjectFacet(WebFacetUtils.WEB_FACET)) {
+			if (Float.parseFloat(facetedProject.getProjectFacetVersion(WebFacetUtils.WEB_FACET).getVersionString()) > 2.5){
+				return createJavaeeObject(rootType);	
+			}
 		}
+		
 		return null;
 	}