[java] AvoidReassigningCatchVariables: fix missing lang attr, add to quickstart

Author: adangel

pmd-java/src/main/resources/category/java/bestpractices.xml

@@ -212,6 +212,7 @@ class Foo {
     </rule>
 
     <rule name="AvoidReassigningCatchVariables"
+          language="java"
           since="6.27.0"
           message="Avoid reassigning caught exception ''{0}''"
           class="net.sourceforge.pmd.lang.java.rule.bestpractices.AvoidReassigningCatchVariablesRule"

pmd-java/src/main/resources/rulesets/java/quickstart.xml

@@ -10,6 +10,7 @@
     <!-- <rule ref="category/java/bestpractices.xml/AccessorMethodGeneration" /> -->
     <!-- <rule ref="category/java/bestpractices.xml/ArrayIsStoredDirectly" /> -->
     <!-- <rule ref="category/java/bestpractices.xml/AvoidPrintStackTrace" /> -->
+    <!-- <rule ref="category/java/bestpractices.xml/AvoidReassigningCatchVariables" /> -->
     <!-- <rule ref="category/java/bestpractices.xml/AvoidReassigningLoopVariables" /> -->
     <!-- <rule ref="category/java/bestpractices.xml/AvoidReassigningParameters" /> -->
     <rule ref="category/java/bestpractices.xml/AvoidMessageDigestField"/>