Bump version to reflect v0.15.0-rc0

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

VERSION

diff --git a/VERSION b/VERSION
index d07c6d0..fc6f294 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-0.14.50
+0.14.90