Replace deprecated SDL APIs

Replace deprecated SDL SdlInstance usage with xapp-frame's SdlStorage
APIs, which have been built on top of the valid SDL SyncStorage APIs.
Upgrade SDL version to v0.8.0.

Issue-Id: RIC-805

Signed-off-by: Timo Tietavainen <timo.tietavainen@nokia.com>
Change-Id: I04142853f74775ae40b71a0bef5431508acbb61a
diff --git a/go.mod b/go.mod
index a53afa1..62a10a5 100644
--- a/go.mod
+++ b/go.mod
@@ -2,7 +2,7 @@
 
 go 1.12
 
-replace gerrit.o-ran-sc.org/r/ric-plt/sdlgo => gerrit.o-ran-sc.org/r/ric-plt/sdlgo.git v0.7.0
+replace gerrit.o-ran-sc.org/r/ric-plt/sdlgo => gerrit.o-ran-sc.org/r/ric-plt/sdlgo.git v0.8.0
 
 replace gerrit.o-ran-sc.org/r/ric-plt/xapp-frame => gerrit.o-ran-sc.org/r/ric-plt/xapp-frame.git v0.9.3
 
@@ -12,10 +12,13 @@
 
 require (
 	gerrit.o-ran-sc.org/r/ric-plt/e2ap v0.0.0-00010101000000-000000000000
-	gerrit.o-ran-sc.org/r/ric-plt/sdlgo v0.7.0
+	gerrit.o-ran-sc.org/r/ric-plt/sdlgo v0.8.0
 	gerrit.o-ran-sc.org/r/ric-plt/xapp-frame v0.0.0-00010101000000-000000000000
+	github.com/go-openapi/errors v0.19.3
 	github.com/go-openapi/runtime v0.19.4
 	github.com/go-openapi/strfmt v0.19.4
+	github.com/go-openapi/swag v0.19.7
+	github.com/go-openapi/validate v0.19.6
 	github.com/gorilla/mux v1.7.1
 	github.com/segmentio/ksuid v1.0.3
 	github.com/spf13/viper v1.4.0