[MINOR] Refactor the tugraz folder to apache

in dev/release/src/test/bin/java/org/

Closes #1011
diff --git a/dev/release/src/test/java/org/tugraz/sysds/validation/Constants.java b/dev/release/src/test/java/org/apache/sysds/validation/Constants.java
similarity index 100%
rename from dev/release/src/test/java/org/tugraz/sysds/validation/Constants.java
rename to dev/release/src/test/java/org/apache/sysds/validation/Constants.java
diff --git a/dev/release/src/test/java/org/tugraz/sysds/validation/Utility.java b/dev/release/src/test/java/org/apache/sysds/validation/Utility.java
similarity index 100%
rename from dev/release/src/test/java/org/tugraz/sysds/validation/Utility.java
rename to dev/release/src/test/java/org/apache/sysds/validation/Utility.java
diff --git a/dev/release/src/test/java/org/tugraz/sysds/validation/ValidateLicAndNotice.java b/dev/release/src/test/java/org/apache/sysds/validation/ValidateLicAndNotice.java
similarity index 100%
rename from dev/release/src/test/java/org/tugraz/sysds/validation/ValidateLicAndNotice.java
rename to dev/release/src/test/java/org/apache/sysds/validation/ValidateLicAndNotice.java