bug symfony#20936 [DependencyInjection] Fix on-invalid attribute type in xsd (ogizanagi)

This PR was merged into the 2.7 branch.

Discussion
----------

[DependencyInjection] Fix on-invalid attribute type in xsd

| Q             | A
| ------------- | ---
| Branch?       | 2.7
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | N/A
| License       | MIT
| Doc PR        | N/A

Commits
-------

e66d3da [DependencyInjection] Fix on-invalid attribute type in xsd

Author: fabpot

src/Symfony/Component/DependencyInjection/Loader/schema/dic/services/services-1.0.xsd

@@ -148,7 +148,7 @@
     <xsd:attribute name="id" type="xsd:string" />
     <xsd:attribute name="key" type="xsd:string" />
     <xsd:attribute name="name" type="xsd:string" />
-    <xsd:attribute name="on-invalid" type="xsd:string" />
+    <xsd:attribute name="on-invalid" type="invalid_sequence" />
     <xsd:attribute name="strict" type="boolean" />
   </xsd:complexType>
 
@@ -161,7 +161,7 @@
     <xsd:attribute name="id" type="xsd:string" />
     <xsd:attribute name="key" type="xsd:string" />
     <xsd:attribute name="index" type="xsd:integer" />
-    <xsd:attribute name="on-invalid" type="xsd:string" />
+    <xsd:attribute name="on-invalid" type="invalid_sequence" />
     <xsd:attribute name="strict" type="boolean" />
   </xsd:complexType>