Staging for version increment automation (#204)

* Version increment automation

Signed-off-by: pgodithi <pgodithi@amazon.com>

* Version increment automation: task rename updateVersion

Signed-off-by: pgodithi <pgodithi@amazon.com>
(cherry picked from commit b3fd723)
Signed-off-by: prudhvigodithi <pgodithi@amazon.com>

build.gradle

@@ -170,3 +170,14 @@ afterEvaluate {
         }
     }
 }
+// updateVersion: Task to auto increment to the next development iteration
+task updateVersion {
+    onlyIf { System.getProperty('newVersion') }
+    doLast {
+        ext.newVersion = System.getProperty('newVersion')
+        println "Setting version to ${newVersion}."
+        // String tokenization to support -SNAPSHOT
+        // Include the required files that needs to be updated with new Version
+        ant.replaceregexp(file:'build.gradle', match: '"opensearch.version", "\\d.*"', replace: '"opensearch.version", "' + newVersion.tokenize('-')[0] + '-SNAPSHOT"', flags:'g', byline:true)
+    }
+}