fix fails of container builds in Azure Pipelines and GitHub Actions (#18)

Author: mmzakhar

.azure-pipelines.yml

@@ -95,7 +95,7 @@ jobs:
 
 - job: build_linux_container_cpp
   pool:
-    vmImage: 'ubuntu-latest'
+    vmImage: 'ubuntu-20.04'
   container: oneapi-hpckit
   steps:
     - script: sudo apt-get update && sudo apt-get install -y git
@@ -105,7 +105,7 @@ jobs:
 
 - job: build_linux_container_fortran
   pool:
-    vmImage: 'ubuntu-latest'
+    vmImage: 'ubuntu-20.04'
   container: oneapi-hpckit
   steps:
     - script: sudo apt-get update && sudo apt-get install -y git
@@ -115,7 +115,7 @@ jobs:
 
 - job: build_linux_container_dpcpp
   pool:
-    vmImage: 'ubuntu-latest'
+    vmImage: 'ubuntu-20.04'
   container: oneapi-basekit
   steps:
     - script: sudo apt-get update && sudo apt-get install -y git

.github/workflows/build_all.yml

@@ -94,7 +94,7 @@ jobs:
       run: scripts/build_linux.sh dpc++
 
   build_linux_container_cpp:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     container: intel/oneapi-hpckit
     steps:
       - uses: actions/checkout@v2
@@ -104,7 +104,7 @@ jobs:
         run: scripts/build_linux.sh c++
 
   build_linux_container_fortran:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     container: intel/oneapi-hpckit
     steps:
       - uses: actions/checkout@v2
@@ -114,7 +114,7 @@ jobs:
         run: scripts/build_linux.sh fortran
 
   build_linux_container_dpcpp:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     container: intel/oneapi-basekit
     steps:
       - uses: actions/checkout@v2