[YOLO] fix pipeline inputs from target branch to source branch (#1480)

Author: datarobot-harness[bot]

.harness/reusable_build_images.yaml

@@ -8,15 +8,15 @@ pipeline:
     ci:
       codebase:
         connectorRef: account.svc_harness_git1
-        repoName: <+pipeline.variables.target_repo>
+        repoName: <+pipeline.variables.repo>
         build:
           type: branch
           spec:
-            branch: <+pipeline.variables.target_branch>
+            branch: <+pipeline.variables.source_branch>
   stages:
     - stage:
         name: Detect changes and output images build matrix
-        identifier: Detect_changes_and_output_images_build_matrix
+        identifier: get_changes_and_output_images_build_matrix
         description: ""
         type: CI
         spec:
@@ -135,7 +135,7 @@ pipeline:
           condition: <+pipeline.variables.envs_folders>!=""
         strategy:
           matrix:
-            image: <+json.list("images", <+pipeline.stages.Detect_changes_and_output_images_build_matrix.spec.execution.steps.Build_params_matrix.output.outputVariables.matrix_json>)>
+            image: <+json.list("images", <+pipeline.stages.get_changes_and_output_images_build_matrix.spec.execution.steps.Build_params_matrix.output.outputVariables.matrix_json>)>
             nodeName: <+matrix.image.repository>:<+matrix.image.tag>
   description: |-
     This pipeline can be used in other repositories to:
@@ -146,14 +146,14 @@ pipeline:
     Branch
     Comma separated list of paths to envs to build
   variables:
-    - name: target_repo
+    - name: repo
       type: String
       description: "Target repo: e.g. datarobot-user-models"
       required: false
       value: <+input>
-    - name: target_branch
+    - name: source_branch
       type: String
-      description: E.g. master
+      description: E.g. branch with the changed code
       required: false
       value: <+input>
     - name: envs_folders

.harness/test_functional_by_framework_multisteps.yaml

@@ -39,12 +39,12 @@ pipeline:
           inputs:
             identifier: WIP_build_images
             variables:
-              - name: target_repo
+              - name: repo
                 type: String
                 value: <+pipeline.variables.target_repo>
-              - name: target_branch
+              - name: source_branch
                 type: String
-                value: <+pipeline.variables.target_branch>
+                value: <+pipeline.variables.source_branch>
               - name: envs_folders
                 type: String
                 value: <+pipeline.stages.Reconcile_envVersionIds_requirements.spec.execution.steps.find_changed.output.outputVariables.CHANGED_DIRS>
@@ -72,7 +72,7 @@ pipeline:
                     build:
                       type: branch
                       spec:
-                        branch: <+pipeline.variables.target_branch>
+                        branch: <+pipeline.variables.source_branch>
                   description: Explicitly clone repo to pull a commit created during reconciliation
               - step:
                   type: Run
@@ -122,7 +122,7 @@ pipeline:
                     build:
                       type: branch
                       spec:
-                        branch: <+pipeline.variables.target_branch>
+                        branch: <+pipeline.variables.source_branch>
                   description: Explicitly clone repo to pull a commit created during reconciliation
               - step:
                   type: Run