Fix order of EmbeddedDataSpecification attributes

Previously, the order of the attributes in class
`EmbeddedDataSpecification` got mixed up, making
the schemas of Release 3.0.8 not backward
compatible, as found out in #477.

This reverts the change of the order of attributes
back to the state of v3.0, so that the schemas are
properly backward compatible.

Fixes #477

schemas/json/aas.json

@@ -505,16 +505,16 @@
     "EmbeddedDataSpecification": {
       "type": "object",
       "properties": {
-        "dataSpecificationContent": {
-          "$ref": "#/definitions/DataSpecificationContent_choice"
-        },
         "dataSpecification": {
           "$ref": "#/definitions/Reference"
+        },
+        "dataSpecificationContent": {
+          "$ref": "#/definitions/DataSpecificationContent_choice"
         }
       },
       "required": [
-        "dataSpecificationContent",
-        "dataSpecification"
+        "dataSpecification",
+        "dataSpecificationContent"
       ]
     },
     "Entity": {

schemas/rdf/shacl-schema.ttl

@@ -415,15 +415,15 @@ aas:EmbeddedDataSpecificationShape a sh:NodeShape ;
     sh:targetClass aas:EmbeddedDataSpecification ;
     sh:property [
         a sh:PropertyShape ;
-        sh:path <https://admin-shell.io/aas/3/0/EmbeddedDataSpecification/dataSpecificationContent> ;
-        sh:class aas:DataSpecificationContent ;
+        sh:path <https://admin-shell.io/aas/3/0/EmbeddedDataSpecification/dataSpecification> ;
+        sh:class aas:Reference ;
         sh:minCount 1 ;
         sh:maxCount 1 ;
     ] ;
     sh:property [
         a sh:PropertyShape ;
-        sh:path <https://admin-shell.io/aas/3/0/EmbeddedDataSpecification/dataSpecification> ;
-        sh:class aas:Reference ;
+        sh:path <https://admin-shell.io/aas/3/0/EmbeddedDataSpecification/dataSpecificationContent> ;
+        sh:class aas:DataSpecificationContent ;
         sh:minCount 1 ;
         sh:maxCount 1 ;
     ] ;

schemas/xml/AAS.xsd

@@ -277,14 +277,14 @@
   </xs:group>
   <xs:group name="embeddedDataSpecification">
     <xs:sequence>
+      <xs:element name="dataSpecification" type="reference_t"/>
       <xs:element name="dataSpecificationContent">
         <xs:complexType>
           <xs:sequence>
             <xs:group ref="dataSpecificationContent_choice"/>
           </xs:sequence>
         </xs:complexType>
       </xs:element>
-      <xs:element name="dataSpecification" type="reference_t"/>
     </xs:sequence>
   </xs:group>
   <xs:group name="entity">