Remove apiVersion attribute from substitutions.src attributes

The src apiVersion attribute will be dynamically validated based
on the loaded schemas.

deckhand/engine/schema/v1_0/default_schema.py

@@ -28,16 +28,12 @@ substitution_schema = {
         'src': {
             'type': 'object',
             'properties': {
-                'apiVersion': {
-                    'type': 'string',
-                    'pattern': '^([A-Za-z]+\/v[0-9]{1})$'
-                },
                 'kind': {'type': 'string'},
                 'name': {'type': 'string'},
                 'path': {'type': 'string'}
             },
             'additionalProperties': False,
-            'required': ['apiVersion', 'kind', 'name', 'path']
+            'required': ['kind', 'name', 'path']
         }
     },
     'additionalProperties': False,

deckhand/tests/unit/resources/sample.yaml

@@ -18,14 +18,12 @@ metadata:
         path: .tls_endpoint.certificate
         replacePattern: 'test.pattern'
       src:
-        apiVersion: deckhand/v1
         kind: Certificate
         name: some-certificate-asdf-1234
         path: .cert
     - dest:
         path: .tls_endpoint.key
       src:
-        apiVersion: deckhand/v1
         kind: CertificateKey
         name: some-certificate-asdf-1234
         path: .key