vnf spin up gr api vnf s base module fails

vnf spin up gr api vnf s base module fails

map object representations of json back to json strings
marshal all objects to json strings before sending
all input params converted to Map<String, Object>
Updated userParams map from HashMap<String, String> to Map<String,
Object> as HashMap<String, String> userParams was causing VNF spin up
to fail. Input json in Userparams was not accepted as a valid json
format. Updated other files that were affected by this change.

Change-Id: I0c00fc00c4c11b54ace4df7be8d5bfc80d41d130
Issue-ID: SO-1582
Signed-off-by: Benjamin, Max (mb388a) <mb388a@us.att.com>