vnfd templates, parameter and config files are sent as yaml
strings in requests body to tacker server.
Change the attributes to dictionary objects. New behavior
is applicable to tosca templates only. Also, this change may mangle
the order of nodes in tosca templates. In order to address this
concern and preserve the network interfaces order in these nodes,
there will be follow on patch (on server) to addres this.
Change-Id: I05a1d60dc643dca864aff559f37491914b1fcfc3
Partial-Bug: #1591361
ed102cac10