Fix EI-1860 by adding application/octet-stream builder/fomatter
Fix EI-1860 by adding application/octet-stream builder/fomatter

This is to fix https://github.com/wso2/product-ei/issues/1860

The following builder formatters are added to the axis2.xml
<messageBuilder contentType="application/octet-stream" class="org.wso2.carbon.relay.BinaryRelayBuilder"/>
<messageFormatter contentType="application/octet-streaml" class="org.wso2.carbon.relay.ExpandingMessageFormatter"/>

wso2/product-ei,wso2/product-ei,madhawa-gunasekara/product-ei,madhawa-gunasekara/product-ei,madhawa-gunasekara/product-ei,wso2/product-ei,milindaperera/product-ei,milindaperera/product-ei,madhawa-gunasekara/product-ei,milindaperera/product-ei,milindaperera/product-ei,milindaperera/product-ei,wso2/product-ei,madhawa-gunasekara/product-ei,wso2/product-ei