software/*: set "type": "object" at root of schemas

Most tools work without this, but it's cleaner to define this anyway

software/cloudooo/instance-cloudooo-input-schema.json

 {
   "$schema": "http://json-schema.org/draft-04/schema#",
+  "type": "object",
   "extends": "./schema-definitions.json#",
   "properties": {
     "tcpv4-port": {

software/fluentd/instance-input-schema.json

 {
   "$schema": "http://json-schema.org/draft-04/schema#",
+  "type": "object",
   "description": "Parameters to instantiate Fluentd",
   "additionalProperties": false,
   "properties": {

software/grafana/instance-input-schema.json

 {
   "$schema": "http://json-schema.org/draft-04/schema#",
   "description": "Parameters to instantiate Grafana",
+  "type": "object",
   "additionalProperties": false,
   "properties": {
     "smtp-server": {

software/jupyter/instance-jupyter-input-schema.json

 {
   "$schema": "http://json-schema.org/draft-04/schema#",
+  "type": "object",
   "description": "Parameters to instantiate Jupyter",
   "properties": {
     "frontend-instance-guid": {

software/monitor/instance-default-input-schema.json

 {
   "$schema": "http://json-schema.org/draft-04/schema#",
+  "type": "object",
   "properties": {
     "dummy": {
       "title": "dummy",

software/neoppod/instance-neo-input-schema.json

 {
   "$schema": "http://json-schema.org/draft-07/schema#",
   "description": "Parameters to instantiate a NEO cluster. See https://lab.nexedi.com/nexedi/neoppod/blob/master/neo.conf for more information.",
+  "type": "object",
   "definitions": {
     "neo-cluster": {
       "additionalProperties": false,

software/proftpd/instance-input-schema.json

 {
   "$schema": "http://json-schema.org/draft-04/schema#",
   "description": "Parameters to instantiate ProFTPd",
+  "type": "object",
   "additionalProperties": false,
   "properties": {
     "port": {

software/pureftpd/instance-input-schema.json

 {
   "$schema": "http://json-schema.org/draft-04/schema#",
   "description": "Parameters to instantiate Pure-FTPd",
+  "type": "object",
   "additionalProperties": false,
   "properties": {
     "port": {

software/re6stnet/instance-re6stnet-input-schema.json

 {
   "$schema": "http://json-schema.org/draft-04/schema#",
+  "type": "object",
   "properties": {
     "ipv6-prefix": {
       "title": "Ipv6 prefix to use to setup the new re6st network",

software/re6stnet/instance-re6stnet-slave-input-schema.json

 {
   "$schema": "http://json-schema.org/draft-04/schema#",
+  "type": "object",
   "properties": {}
 }

software/slaprunner/instance-runner-input-schema.json

 {
   "$schema": "http://json-schema.org/draft-04/schema#",
+  "type": "object",
   "properties": {
     "instance-name": {
       "title": "Instance Name",

software/theia/instance-input-schema.json

 {
   "$schema": "http://json-schema.org/draft-04/schema#",
+  "type": "object",
   "description": "Parameters to instantiate Theia",
   "additionalProperties": false,
   "properties": {

software/varnish/instance-varnish-input-schema.json

 {
   "$schema": "http://json-schema.org/draft-04/schema#",
+  "type": "object",
   "extends": "./schema-definitions.json#",
   "properties": {
     "tcpv4-port": {