App Component Tests (#1033)

Add app component tests contributes to hyperledger/composer#952

Author: cazfletch

packages/composer-playground/.istanbul.yml

@@ -6,7 +6,7 @@ instrumentation:
  - "docker/*"
 check:
  global:
- statements: 82
- branches: 76
- functions: 72
- lines: 81
+ statements: 83
+ branches: 79
+ functions: 74
+ lines: 83