Yaml syntax cleanup

* remove 'error' like:
- no new line character at the end of file
- trailing spaces

Change-Id: I981f5353a5bd5bfb1546946b240a85905272887e

DockerInterfacesLibrary/package/Classes/DockerHelpers.yaml

@@ -18,7 +18,7 @@ Name: DockerHelpers
 Methods:
   labels2Map:
     Arguments:
-      labelsString: 
+      labelsString:
         Contract: $.string().notNull()
     Body:
       - $result: {}
@@ -35,8 +35,8 @@ Methods:
 
   map2labels:
     Arguments:
-      labelsMap: 
-        Contract: 
+      labelsMap:
+        Contract:
           $.string().notNull(): $.string().notNull()
     Body:
       - Return: $labelsMap.select(list($, $labelsMap.get($)).join('=')).join(';')

DockerInterfacesLibrary/package/Classes/DockerVolume.yaml

@@ -21,7 +21,7 @@ Properties:
 
 Methods:
   getType:
-  
+
   getParameters:
 
   getRepresentation:
@@ -29,3 +29,4 @@ Methods:
       Return:
         type: $.getType()
         parameters: $.getParameters()
+