changing the carbon.apimgt.version to 6.1.73
changing the carbon.apimgt.version to 6.1.73

jaadds/product-apim,wso2/product-apim,tharikaGitHub/product-apim,chamilaadhi/product-apim,wso2/product-apim,chamilaadhi/product-apim,jaadds/product-apim,tharikaGitHub/product-apim,tharikaGitHub/product-apim,wso2/product-apim,jaadds/product-apim,chamilaadhi/product-apim,chamilaadhi/product-apim,wso2/product-apim,wso2/product-apim,tharikaGitHub/product-apim,jaadds/product-apim,tharikaGitHub/product-apim,chamilaadhi/product-apim