try to fix gradle build

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1855970 13f79535-47bb-0310-9956-ffa450edef68

build.gradle

@@ -26,9 +26,6 @@ buildscript {
 }
 
 repositories {
-    maven {
-        url 'https://repository.apache.org/content/repositories/staging'
-    }
     mavenCentral()
 }
 
@@ -217,6 +214,14 @@ project('main') {
 }
 
 project('ooxml') {
+
+    repositories {
+        maven {
+            url 'https://repository.apache.org/content/repositories/staging'
+        }
+        mavenCentral()
+    }
+    
     sourceSets.main.java.srcDirs = ['../../src/ooxml/java']
     sourceSets.main.resources.srcDirs = ['../../src/ooxml/resources', '../../src/resources/ooxml']
     sourceSets.test.java.srcDirs = ['../../src/ooxml/testcases']