Build snapshot build by default with the same version as OpenSearch. (o…

…pensearch-project#58)

Signed-off-by: dblock <[email protected]>

build.gradle

@@ -44,7 +44,17 @@ repositories {
     jcenter()
 }
 
-group 'org.opensearch.commons'
+ext {
+    isSnapshot = "true" == System.getProperty("build.snapshot", "true")
+}
+
+allprojects {
+    group 'org.opensearch.commons'
+    version = opensearch_version - '-SNAPSHOT' + '.0'
+    if (isSnapshot) {
+        version += "-SNAPSHOT"
+    }
+}
 
 sourceCompatibility = 1.8
 
@@ -146,8 +156,6 @@ task javadocJar(type: Jar) {
     from javadoc.destinationDir
 }
 
-version '1.1.0.0'
-
 publishing {
     publications {
         shadow(MavenPublication) {