bump drools-apps to 1.7.4-SNAPSHOT

Issue-ID: POLICY-2839
Change-Id: Ie0bc82d0f8a09dc4d65e056dc7836870dae58835
Signed-off-by: Taka Cho <takamune.cho@att.com>
diff --git a/version.properties b/version.properties
index e783874..058fdc4 100644
--- a/version.properties
+++ b/version.properties
@@ -4,7 +4,7 @@
 
 major=1
 minor=7
-patch=3
+patch=4
 
 base_version=${major}.${minor}.${patch}