Add attribute "marketplace_title" to VMIRelease

This commit introduces a new optional parameter on `VMIRelease` and
`AmiRelease` models called `marketplace_title` which is going to be used
by the pubtool as the marketplace "version title" whenever it's set, by
overriding the usual version title which the pubtool was going to
compute.

This is required for some layered products which requires a
specialized templating title instead of the one generated by the
pubtool.

With this, it will be possible to transport the template via the
VMIPushItem from the source to the pubtooling which will format it into
the apropriate value for the marketaplace.

Refers to SPSTRAT-116

src/pushsource/_impl/model/ami.py

@@ -27,6 +27,7 @@ def _from_data(cls, data):
             "base_version": data.get("base_version") or None,
             "variant": data.get("variant") or None,
             "type": data.get("type") or None,
+            "marketplace_title": data.get("marketplace_title") or None,
         }
         return cls(**kwargs)
 

src/pushsource/_impl/model/vms.py

@@ -54,6 +54,13 @@ class VMIRelease(object):
     type = attr.ib(type=str, default=None, validator=optional_str)
     """Release type, typically "ga" or "beta"."""
 
+    marketplace_title = attr.ib(type=str, default=None, validator=optional_str)
+    """Customer facing title or title template for the marketplace release. It supports any
+    variable named after the attributes from this class, except itself.
+
+    Example:
+    "7.4 Update {version} on RHEL {base_version} {date}-{respin}"."""
+
 
 @attr.s()
 class VMIPushItem(PushItem):

tests/baseline/cases/staged-simple-ami-bc.yml

@@ -34,6 +34,7 @@ items:
       base_product: null
       base_version: null
       date: 2020-05-11
+      marketplace_title: null
       product: Fake-Product
       respin: 1
       type: ga

tests/baseline/cases/staged-simple-ami-bootmode.yml

@@ -30,6 +30,7 @@ items:
       base_product: null
       base_version: null
       date: 2020-05-11
+      marketplace_title: null
       product: Fake-Product
       respin: 1
       type: ga

tests/baseline/cases/staged-simple-ami-uefi.yml

@@ -30,6 +30,7 @@ items:
       base_product: null
       base_version: null
       date: 2020-05-11
+      marketplace_title: null
       product: Fake-Product
       respin: 1
       type: ga

tests/baseline/cases/staged-simple-ami.yml

@@ -30,6 +30,7 @@ items:
       base_product: null
       base_version: null
       date: 2020-05-11
+      marketplace_title: null
       product: Fake-Product
       respin: 1
       type: ga

tests/staged/data/simple_ami/staged.yaml

@@ -16,6 +16,7 @@ payload:
         product: Fake-Product
         respin: 1
         type: ga
+        marketplace_title: "Fake marketplace title"
         variant: Fake-Variant
         version: Fake-Version
       root_device: /dev/sda1

tests/staged/data/simple_ami_with_bc/staged.yaml

@@ -18,6 +18,7 @@ payload:
         type: ga
         variant: Fake-Variant
         version: Fake-Version
+        marketplace_title: "Fake marketplace title"
       marketplace_entity_type: AMIProduct
       recommended_instance_type: t2.micro
       usage_instructions: fake usage instructions