Upgrade carbon.apimgt.version to 6.3.48
Upgrade carbon.apimgt.version to 6.3.48

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