Fixes json lib plugin maven errors

* json.lib should not have a maven nature since this just generates m2e
  errors in eclipse

* Corrects the dependent jar name in the plugin to stop the plugin being
  completely rebuilt everytime a workspace build is initiated.

plugins/org.teiid.designer.json.lib/.project

@@ -35,14 +35,8 @@
 			<arguments>
 			</arguments>
 		</buildCommand>
-		<buildCommand>
-			<name>org.eclipse.m2e.core.maven2Builder</name>
-			<arguments>
-			</arguments>
-		</buildCommand>
 	</buildSpec>
 	<natures>
-		<nature>org.eclipse.m2e.core.maven2Nature</nature>
 		<nature>org.eclipse.pde.PluginNature</nature>
 		<nature>org.eclipse.jdt.core.javanature</nature>
 		<nature>org.eclipse.pde.api.tools.apiAnalysisNature</nature>

plugins/org.teiid.designer.json.lib/build.xml

@@ -19,7 +19,7 @@
 	<import file="${GIT-HOME}/scripts/build-common.xml" />
 
 	<!-- Comma-separated list of required libraries -->
-	<property name="libs" value="org.json.jar"/>
+	<property name="libs" value="json.jar"/>
 
 	<!--
 	   Test whether all the required libraries are present