[eclipse-kanto#118] Provide integration test for the CLI get command

Created golden file and test case scenarios with exit code 1.

Signed-off-by: Daniel Milchev <fixed-term.daniel.milchev@bosch.io>

integration/testdata/get-help.golden

@@ -0,0 +1,18 @@
+Get detailed information about a given container.
+
+Usage:
+  kanto-cm get <container-id>
+
+Examples:
+get <container-id>
+ get --name <container-name>
+ get -n <container-name>
+
+Flags:
+  -h, --help          help for get
+  -n, --name string   Get the information about a container with a specific name.
+
+Global Flags:
+      --debug         Switch commands log level to DEBUG mode
+      --host string   Specify the address path to the Eclipse Kanto container management (default "/run/container-management/container-management.sock")
+      --timeout int   Specify the connection timeout in seconds to the Eclipse Kanto container management (default 30)

integration/testdata/get-test.yaml

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+name: get_help
+command:
+  binary: kanto-cm
+  args: ["get", "-h"]
+expected:
+  exitCode: 0
+goldenFile: "get-help.golden"
+---
+name: get_invalid_id
+command:
+  binary: kanto-cm
+  args: ["get", "invalid"]
+expected:
+  exitCode: 1
+  err: "Error: The requested container with ID = invalid was not found"
+---
+name: get_invalid_name
+command:
+  binary: kanto-cm
+  args: ["get", "-n", "invalid"]
+expected:
+  exitCode: 1
+  err: "Error: The requested container with name = invalid was not found. Try using an ID instead."