Rpm: remove daemonize dep for rhel >=7.

Reviewed at https://reviews.apache.org/r/37862/
diff --git a/specs/rpm/aurora.spec b/specs/rpm/aurora.spec
index 3e7b8be..0f3d0a7 100644
--- a/specs/rpm/aurora.spec
+++ b/specs/rpm/aurora.spec
@@ -127,8 +127,8 @@
 Group: Applications/System
 
 Requires: cyrus-sasl
-Requires: daemonize
 %if 0%{?rhel} && 0%{?rhel} < 7
+Requires: daemonize
 Requires: docker-io
 %else
 Requires: docker