upate the hadoop.version property in the root pom.xml and hadoop.assemblies.version in hadoop-project/pom.xml (see HADOOP-15369)

hadoop-project/pom.xml

@@ -52,7 +52,7 @@
 
     <kafka.version>2.4.0</kafka.version>
 
-    <hadoop.assemblies.version>3.3.0-SNAPSHOT</hadoop.assemblies.version>
+    <hadoop.assemblies.version>3.4.0-SNAPSHOT</hadoop.assemblies.version>
     <commons-daemon.version>1.0.13</commons-daemon.version>
 
     <test.build.dir>${project.build.directory}/test-dir</test.build.dir>

pom.xml

@@ -80,7 +80,7 @@ xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/x
 
   <properties>
     <!-- required as child projects with different version can't use ${project.version} -->
-    <hadoop.version>3.3.0-SNAPSHOT</hadoop.version>
+    <hadoop.version>3.4.0-SNAPSHOT</hadoop.version>
 
     <distMgmtSnapshotsId>apache.snapshots.https</distMgmtSnapshotsId>
     <distMgmtSnapshotsName>Apache Development Snapshot Repository</distMgmtSnapshotsName>