Forced set of JAVA_HOME

Author: max-allan-surevine

build/debian/rules

@@ -13,7 +13,7 @@ ETCDIR := $(DEST)/etc/openfire
 LOGDIR := $(DEST)/var/log/openfire
 VARDIR := $(DEST)/var/lib/openfire
 
-JAVA_HOME ?= /usr/lib/jvm/java-8-openjdk-amd64
+JAVA_HOME := /usr/lib/jvm/java-8-openjdk-amd64
 DEB_ANT_BUILDFILE := build/build.xml
 DEB_ANT_CLEAN_TARGET := clean