Add 7.2 to Azure devops matrix and update Linux integration tests for all versions

Author: Mpdreamz

azure-pipelines.yml

@@ -34,6 +34,8 @@ jobs:
         esVersion: '7.0.0'
       es71:
         esVersion: '7.1.0'
+      es72:
+        esVersion: '7.2.0'
       latest7:
         esVersion: 'latest-7'
   steps:
@@ -53,8 +55,14 @@ jobs:
   strategy:
       maxParallel: 5
       matrix:
-          latest7:
-              esVersion: 'latest-7'
+        es7:
+	      esVersion: '7.0.0'
+	    es71:
+	      esVersion: '7.1.0'
+	    es72:
+	      esVersion: '7.2.0'
+	    latest7:
+	      esVersion: 'latest-7'
   steps:
       - script: './build.sh integrate-one $(esVersion) "readonly,writable" skipdocs'
         displayName: '$(esVersion) linux integration tests'