[FAB-9706] Fix broken Search

Search is broken in ReadtheDocs
due to a RTD bug. Setting the
sphinx-rtd-theme==v0.2.5b2

Change-Id: I04e9d726ee9046ad312826d5ac93e063ccc2f326
Signed-off-by: pama-ibm <pama@ibm.com>

Author: pamandrejko

docs/requirements.txt

@@ -12,5 +12,5 @@ pytz==2016.4
 six==1.10.0
 snowballstemmer==1.2.1
 Sphinx==1.7.2
-sphinx-rtd-theme==v0.3.0
+sphinx-rtd-theme==0.2.5b2
 recommonmark==0.4.0