Fix style check && install git for showcast-unit

Author: lidizheng

.circleci/config.yml

@@ -367,7 +367,7 @@ jobs:
           name: Install system dependencies.
           command: |
             apt-get update
-            apt-get install -y curl pandoc unzip
+            apt-get install -y curl pandoc unzip git
       - run:
           name: Install protoc 3.12.1.
           command: |
@@ -391,7 +391,7 @@ jobs:
           name: Install system dependencies.
           command: |
             apt-get update
-            apt-get install -y curl pandoc unzip
+            apt-get install -y curl pandoc unzip git
       - run:
           name: Install protoc 3.12.1.
           command: |
@@ -415,7 +415,7 @@ jobs:
           name: Install system dependencies.
           command: |
             apt-get update
-            apt-get install -y curl pandoc unzip
+            apt-get install -y curl pandoc unzip git
       - run:
           name: Install protoc 3.12.1.
           command: |

tests/system/conftest.py

@@ -133,7 +133,6 @@ def async_identity():
     return IdentityAsyncClient(transport=transport)
 
 
-
 @pytest.fixture
 def identity(use_mtls):
     return construct_client(IdentityClient, use_mtls)