Replace maven.multiModuleProjectDirectory with openrs2.root

openrs2.root works correctly even if the root of the reactor is a child
project, at the expense of having to re-define the property in each
module.

asm/pom.xml

@@ -13,6 +13,10 @@
 
   <name>OpenRS2 ASM Utilities</name>
 
+  <properties>
+    <openrs2.root>${project.parent.basedir}</openrs2.root>
+  </properties>
+
   <dependencies>
     <dependency>
       <groupId>dev.openrs2</groupId>

decompiler/pom.xml

@@ -13,6 +13,10 @@
 
   <name>OpenRS2 Decompiler</name>
 
+  <properties>
+    <openrs2.root>${project.parent.basedir}</openrs2.root>
+  </properties>
+
   <dependencies>
     <dependency>
       <groupId>dev.openrs2</groupId>

deob-annotations/pom.xml

@@ -12,4 +12,8 @@
   <packaging>jar</packaging>
 
   <name>OpenRS2 Deobfuscator Annotations</name>
+
+  <properties>
+    <openrs2.root>${project.parent.basedir}</openrs2.root>
+  </properties>
 </project>

deob/pom.xml

@@ -13,6 +13,10 @@
 
   <name>OpenRS2 Deobfuscator</name>
 
+  <properties>
+    <openrs2.root>${project.parent.basedir}</openrs2.root>
+  </properties>
+
   <dependencies>
     <dependency>
       <groupId>dev.openrs2</groupId>

game/pom.xml

@@ -13,6 +13,10 @@
 
   <name>OpenRS2 Game Server</name>
 
+  <properties>
+    <openrs2.root>${project.parent.basedir}</openrs2.root>
+  </properties>
+
   <dependencies>
     <dependency>
       <groupId>co.paralleluniverse</groupId>

gl-dri-natives/pom.xml

@@ -13,6 +13,10 @@
 
   <name>OpenRS2 GL DRI Natives</name>
 
+  <properties>
+    <openrs2.root>${project.parent.basedir}</openrs2.root>
+  </properties>
+
   <profiles>
     <profile>
       <id>unix</id>

gl-natives/pom.xml

@@ -13,6 +13,10 @@
 
   <name>OpenRS2 GL Natives</name>
 
+  <properties>
+    <openrs2.root>${project.parent.basedir}</openrs2.root>
+  </properties>
+
   <build>
     <plugins>
       <plugin>

misc-natives/pom.xml

@@ -12,4 +12,8 @@
   <packaging>nar</packaging>
 
   <name>OpenRS2 Misc Natives</name>
+
+  <properties>
+    <openrs2.root>${project.parent.basedir}</openrs2.root>
+  </properties>
 </project>

pom.xml

@@ -19,6 +19,7 @@
   </modules>
 
   <properties>
+    <openrs2.root>${project.basedir}</openrs2.root>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
   </properties>
 
@@ -264,7 +265,7 @@
         <groupId>org.codehaus.mojo</groupId>
         <artifactId>versions-maven-plugin</artifactId>
         <configuration>
-          <rulesUri>file://${maven.multiModuleProjectDirectory}/version-rules.xml</rulesUri>
+          <rulesUri>file://${openrs2.root}/version-rules.xml</rulesUri>
         </configuration>
       </plugin>
     </plugins>

util/pom.xml

@@ -13,6 +13,10 @@
 
   <name>OpenRS2 Utilities</name>
 
+  <properties>
+    <openrs2.root>${project.parent.basedir}</openrs2.root>
+  </properties>
+
   <dependencies>
     <dependency>
       <groupId>com.google.guava</groupId>