Allows forward-compatibility by ignoring unexpected enumeration values
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                 Key: AXIS2-5273
                 URL: https://issues.apache.org/jira/browse/AXIS2-5273
             Project: Axis2
          Issue Type: Bug
          Components: adb, codegen
    Affects Versions: 1.7.0
            Reporter: Cleber Zarate
            Priority: Minor


[AXIS2-4859] has been patched adding the -Eiu option to ignore unexpected 
elements. However, to truly be forward-compatibly, generated code should also 
ignore unexpected enumeration values.
Here's the snippet necessary for the adb code generation. I opted to return 
null when an unexpected enumeration is found, as opposed to skip it:

ADBBeanTemplate-bean.xsl line 2135:

                    // handle unexpected enumeration values properly
                    <xsl:if test="$ignoreunexpected">
                        log.warn("Unexpected value " + value + " for 
enumeration <xsl:value-of select="$name"/>");
                        return enumeration;
                    </xsl:if>
                    <xsl:if test="not($ignoreunexpected)">
                        if ((enumeration == null) &amp;&amp; !((value == null) 
|| (value.equals("")))) {
                            throw new java.lang.IllegalArgumentException();
                        }
                        return enumeration;
                    </xsl:if>


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