Update ubuntu vm image to 20.0.4 (Azure#22261)

* Update ubuntu vm image to 20.0.4

* Update platform matrix to use ubuntu 20

Author: chidozieononiwu

eng/mgmt/automation/generation.yml

@@ -3,7 +3,7 @@ trigger: none
 pr: none
 
 pool:
-  vmImage: 'ubuntu-18.04'
+  vmImage: 'ubuntu-20.04'
 
 variables:
 - group: Release Secrets for GitHub

eng/pipelines/aggregate-reports.yml

@@ -15,7 +15,7 @@ jobs:
     variables:
       - template: /eng/pipelines/templates/variables/globals.yml
     pool:
-      vmImage: 'ubuntu-18.04'
+      vmImage: 'ubuntu-20.04'
     steps:
     - template: /eng/pipelines/templates/steps/cache-maven-repository.yml
       parameters:

eng/pipelines/templates/jobs/build-validate-pom.yml

@@ -11,8 +11,8 @@ jobs:
       - template: ../variables/globals.yml
 
     pool:
-      name: azsdk-pool-mms-ubuntu-1804-general
-      vmImage: MMSUbuntu18.04
+      name: azsdk-pool-mms-ubuntu-2004-general
+      vmImage: MMSUbuntu20.04
 
     strategy:
       matrix:

eng/pipelines/templates/jobs/ci.yml

@@ -157,8 +157,8 @@ jobs:
       - template: ../variables/globals.yml
 
     pool:
-      name: azsdk-pool-mms-ubuntu-1804-general
-      vmImage: MMSUbuntu18.04
+      name: azsdk-pool-mms-ubuntu-2004-general
+      vmImage: MMSUbuntu20.04
 
     steps:
       - task: UsePythonVersion@0

eng/pipelines/templates/stages/archetype-java-release-pom-only.yml

@@ -19,7 +19,7 @@ stages:
         variables:
           - template: ../variables/globals.yml
         pool:
-          vmImage: ubuntu-18.04
+          vmImage: ubuntu-20.04
         strategy:
           runOnce:
             deploy:

eng/pipelines/templates/stages/archetype-java-release.yml

@@ -38,8 +38,8 @@ stages:
         variables:
           - template: ../variables/globals.yml
         pool:
-          name: azsdk-pool-mms-ubuntu-1804-general
-          vmImage: MMSUbuntu18.04
+          name: azsdk-pool-mms-ubuntu-2004-general
+          vmImage: MMSUbuntu20.04
         strategy:
           runOnce:
             deploy:
@@ -78,8 +78,8 @@ stages:
             variables:
               - template: ../variables/globals.yml
             pool:
-              name: azsdk-pool-mms-ubuntu-1804-general
-              vmImage: MMSUbuntu18.04
+              name: azsdk-pool-mms-ubuntu-2004-general
+              vmImage: MMSUbuntu20.04
 
             steps:
               - template: /eng/common/pipelines/templates/steps/sparse-checkout.yml

eng/pipelines/templates/stages/archetype-sdk-management.yml

@@ -23,7 +23,7 @@ stages:
           JavaVersion: '1.8'
 
     pool:
-      vmImage: 'ubuntu-18.04'
+      vmImage: 'ubuntu-20.04'
 
     steps:
       - task: Maven@3

eng/pipelines/templates/stages/platform-matrix.json

@@ -4,7 +4,7 @@
   },
   "matrix": {
     "Agent": {
-      "ubuntu-18.04": { "OSVmImage": "MMSUbuntu18.04", "Pool": "azsdk-pool-mms-ubuntu-1804-general" },
+      "ubuntu-20.04": { "OSVmImage": "MMSUbuntu20.04", "Pool": "azsdk-pool-mms-ubuntu-2004-general" },
       "windows-2019": { "OSVmImage": "MMS2019", "Pool": "azsdk-pool-mms-win-2019-general" },
       "macOS-10.15": { "OSVmImage": "macOS-10.15", "Pool": "Azure Pipelines" }
     },
@@ -22,7 +22,7 @@
   "include": [
     {
       "Agent": {
-          "ubuntu-18.04": { "OSVmImage": "MMSUbuntu18.04", "Pool": "azsdk-pool-mms-ubuntu-1804-general" }
+          "ubuntu-20.04": { "OSVmImage": "MMSUbuntu20.04", "Pool": "azsdk-pool-mms-ubuntu-2004-general" }
       },
       "JavaTestVersion": "1.11",
       "AZURE_TEST_HTTP_CLIENTS": "netty",

sdk/cosmos/azure-cosmos-benchmark/ctl-image-build.yml

@@ -11,7 +11,7 @@ jobs:
         value: 'javactl.azurecr.io'
 
     pool:
-      vmImage: 'ubuntu-18.04'
+      vmImage: 'ubuntu-20.04'
 
     steps:
     - task: Maven@3

sdk/cosmos/spark.databricks.yml

@@ -19,7 +19,7 @@ stages:
       timeoutInMinutes: 40
 
       pool:
-        vmImage: 'ubuntu-18.04'
+        vmImage: 'ubuntu-20.04'
 
       steps:
       - task: Maven@3