Support to specify docker image for each test case

1. Currently each type of test cases will use one docker image.
2. For example,
   Functest test cases use opnfv/functest-restapi:euphrates
   Yardstick uses opnfv/yardstick:opnfv-5.1.0
3. It needs to support to specify the docker image for each test case.
4. For example,
   vping test cases use opnfv/functest-smoke:euphrates
   sdnvpn uses opnfv/functest-features:euphrates
5. The benefit of this is that these docker images are well verified
   by Functest CI and from Functest plan, they may not support
   functest-restapi docker image in its future release.

JIRA: DOVETAIL-638

Change-Id: I8a30eea2233aeff809af2e241b6c939194397832
Signed-off-by: xudan <xudan16@huawei.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/dovetail/utils/dovetail_utils.py b/dovetail/utils/dovetail_utils.py
index dc7dbafb..4a3d8528 100644
--- a/dovetail/utils/dovetail_utils.py
+++ b/dovetail/utils/dovetail_utils.py
@@ -408,3 +408,20 @@ def read_plain_file(file_path, logger=None):
         logger.exception("Failed to read file {}, exception: {}"
                          .format(file_path, e))
         return None
+
+
+def get_value_from_dict(key_path, input_dict):
+    """
+    Returns the value of a key in input_dict
+    key_path must be given in string format with dots
+    Example: result.dir
+    """
+    if not isinstance(key_path, str):
+        return None
+    for key in key_path.split("."):
+        if not isinstance(input_dict, dict):
+            return None
+        input_dict = input_dict.get(key)
+        if not input_dict:
+            return None
+    return input_dict