Remove openjdk runtime requirement.
This addresses one of my +0s.
Testing Done:
Using a clean vagrant environment installed aurora, then installed the
oracle jdk, then uninstalled java-1.8.0-openjdk-headless (that aurora
brought in transitively). RPM didn't complain and when I restarted
the scheduler it was running under the new JVM.
```
[vagrant@localhost ~]$ curl -s http://localhost:8081/vars | grep 'jvm_prop_java_vendor '
jvm_prop_java_vendor Oracle Corporation
[vagrant@localhost ~]$
```
Reviewed at https://reviews.apache.org/r/38080/
diff --git a/specs/rpm/aurora.spec b/specs/rpm/aurora.spec
index 2e4ff64..cf9c271 100644
--- a/specs/rpm/aurora.spec
+++ b/specs/rpm/aurora.spec
@@ -96,7 +96,7 @@
%if 0%{?rhel} && 0%{?rhel} < 7
Requires: daemonize
%endif
-Requires: java-%{JAVA_VERSION}-openjdk
+Requires: java-%{JAVA_VERSION}
Requires: mesos = %{MESOS_VERSION}
