Moved ProxyAuthenticationMethod enum from XenCenter into SDK
Moved ProxyAuthenticationMethod enum from XenCenter into SDK

Signed-off-by: Frederico Mazzone <e878d16deecffe8b35cef9a75715570b13193bd0@citrix.com>

xapi-project/xen-api-sdk,stephen-turner/xen-api-sdk,kc284/xen-api-sdk,stephen-turner/xen-api-sdk,stephen-turner/xen-api-sdk,stephen-turner/xen-api-sdk,xapi-project/xen-api-sdk,kc284/xen-api-sdk,stephen-turner/xen-api-sdk,xapi-project/xen-api-sdk,kc284/xen-api-sdk,xapi-project/xen-api-sdk,xapi-project/xen-api-sdk,kc284/xen-api-sdk,kc284/xen-api-sdk,xapi-project/xen-api-sdk,kc284/xen-api-sdk,stephen-turner/xen-api-sdk