Fix other misspell issues

See,
$ find . -type f | xargs misspell -locale US | grep -vi -e vendor -e node_modules -e devenv -e unknwon -e destory -e yarn -e adn -e Spindel

conf/provisioning/datasources/sample.yaml

@@ -7,7 +7,7 @@ apiVersion: 1
 #     orgId: 1
 
 # # list of datasources to insert/update depending
-# # on what's available in the datbase
+# # on what's available in the database
 #datasources:
 #   # <string, required> name of the datasource. Required
 # - name: Graphite