Avoid sending path across the wire for local resource file name

Fixes #669

Author: cderici

juju/model.py

@@ -1858,7 +1858,7 @@ async def add_local_resources(self, application, entity_url, metadata, resources
                 'description': '',
                 'fingerprint': '',
                 'name': name,
-                'path': path,
+                'path': Path(path).name,
                 'revision': 0,
                 'size': 0,
                 'type_': resource_type,

tests/integration/bundle-file-resource.yaml

@@ -0,0 +1,6 @@
+applications:
+  file-resource-charm:
+    charm: ./file-resource-charm
+    num_units: 1
+    resources:
+      file-res: ./file-resource-charm/test.file

tests/integration/test_model.py

@@ -23,8 +23,8 @@
 MB = 1
 GB = 1024
 SSH_KEY = 'ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCsYMJGNGG74HAJha3n2CFmWYsOOaORnJK6VqNy86pj0MIpvRXBzFzVy09uPQ66GOQhTEoJHEqE77VMui7+62AcMXT+GG7cFHcnU8XVQsGM6UirCcNyWNysfiEMoAdZScJf/GvoY87tMEszhZIUV37z8PUBx6twIqMdr31W1J0IaPa+sV6FEDadeLaNTvancDcHK1zuKsL39jzAg7+LYjKJfEfrsQP+lj/EQcjtKqlhVS5kzsJVfx8ZEd0xhW5G7N6bCdKNalS8mKCMaBXJpijNQ82AiyqCIDCRrre2To0/i7pTjRiL0U9f9mV3S4NJaQaokR050w/ZLySFf6F7joJT mathijs@Qrama-Mathijs'  # noqa
-HERE_DIR = Path(__file__).absolute().parent
-TESTS_DIR = HERE_DIR.parent
+HERE_DIR = Path(__file__).absolute().parent  # tests/integration
+TESTS_DIR = HERE_DIR.parent  # tests/
 OVERLAYS_DIR = HERE_DIR / 'bundle' / 'test-overlays'
 
 
@@ -61,6 +61,20 @@ async def test_deploy_local_bundle_file(event_loop):
                                 timeout=60 * 4)
 
 
+@base.bootstrapped
+@pytest.mark.asyncio
+async def test_deploy_bundle_local_resource_relative_path(event_loop):
+    bundle_file_path = HERE_DIR / 'bundle-file-resource.yaml'
+
+    async with base.CleanModel() as model:
+        await model.deploy(str(bundle_file_path))
+
+        app = model.applications.get('file-resource-charm')
+        assert app
+        await model.block_until(lambda: (len(app.units) == 1),
+                                timeout=60 * 4)
+
+
 @base.bootstrapped
 @pytest.mark.asyncio
 async def test_deploy_local_bundle_include_file(event_loop):