Update ubuntu version for python 3.7.

Signed-off-by: Jay Zhang <[email protected]>

Author: fatcat-z

.github/actions/keras_application_test/action.yml

@@ -72,5 +72,7 @@ runs:
       run: |
           python -c "import onnxruntime"
           pytest tests/keras2onnx_unit_tests --doctest-modules --junitxml=junit/test-results.xml
+
+          export TF_USE_LEGACY_KERAS=True
           cd tests/keras2onnx_applications/nightly_build
           python run_all_v2.py

.github/actions/keras_unit_test/action.yml

@@ -36,7 +36,8 @@ runs:
           pip install "protobuf~=3.20"
           if [[ ${{ inputs.tf_version }} == 1.* ]]; then 
               pip install numpy==1.19.0
-          else 
+          else
+              pip install tf_keras
               pip install "numpy<2"
           fi
 
@@ -49,6 +50,7 @@ runs:
       shell: bash
       if: runner.os == 'Linux'
       run: |
+          export TF_USE_LEGACY_KERAS=True
           python -c "import onnxruntime"
           python -c "import onnxconverter_common"
           pytest tests/keras2onnx_unit_tests --doctest-modules --junitxml=junit/test-results.xml

.github/workflows/keras_application_test_ci.yml

@@ -66,7 +66,7 @@ jobs:
   Test_py37_with_tf1_15: # Do not change this name because it is used in Ruleset of this repo.
     strategy:
       fail-fast: false
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
 
     steps:
       - name: Checkout code

.github/workflows/keras_unit_test_ci.yml

@@ -65,7 +65,7 @@ jobs:
   Test_py37_with_tf1_15: # Do not change this name because it is used in Ruleset of this repo.
     strategy:
       fail-fast: false
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
 
     steps:
       - name: Checkout code

.github/workflows/pretrained_model_test_ci.yml

@@ -91,7 +91,7 @@ jobs:
           - name: 'py37-tf1.15'
             tf_version: '1.15.5'
             python_version: '3.7'
-            os: 'ubuntu-latest'
+            os: 'ubuntu-22.04'
             opset_version: '15'
             ort_version: '1.14.1'
             onnx_version: '1.14.1'

.github/workflows/unit_test_ci.yml

@@ -91,7 +91,7 @@ jobs:
           - name: 'py37-tf1.15'
             tf_version: '1.15.5'
             python_version: '3.7'
-            os: 'ubuntu-latest'
+            os: 'ubuntu-22.04'
             opset_version: '15'
             ort_version: '1.14.1'
             onnx_version: '1.14.1'