Add link to ONAP Readthedocs

Issue-ID: NONRTRIC-762
Signed-off-by: elinuxhenrik <henrik.b.andersson@est.tech>
Change-Id: I927ed958f88b33a3ad301aadd3c7b817e6af7cc0
diff --git a/docs/conf.py b/docs/conf.py
index 65fb219..66c7edf 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -3,6 +3,7 @@
 #branch configuration
 
 branch = 'latest'
+onapbranch = 'latest'
 
 linkcheck_ignore = [
     'http://localhost.*',
@@ -16,3 +17,4 @@
 intersphinx_mapping = {}
 
 intersphinx_mapping['nonrtric'] = ('https://docs.o-ran-sc.org/projects/o-ran-sc-nonrtric/en/%s' % branch, None)
+intersphinx_mapping['onapa1policymanagementservice'] = ('https://docs.onap.org/projects/onap-ccsdk-oran/en/%s' % onapbranch, None)