Rename netconf test schemas

Some of these were missing revision and started failing
once testtool stopped renaming the schemas and started
rejecting them instead.

Change-Id: I8c73150902d21e268d2a7f9bc8fc2c400f340271
Signed-off-by: Tomas Cere <tomas.cere@pantheon.tech>

diff --git a/csit/variables/netconf/CRUD/schemas/augment-main-a.yang b/csit/variables/netconf/CRUD/schemas/augment-main-a@2014-01-21.yang
similarity index 100%
rename from csit/variables/netconf/CRUD/schemas/augment-main-a.yang
rename to csit/variables/netconf/CRUD/schemas/augment-main-a@2014-01-21.yang

diff --git a/csit/variables/netconf/CRUD/schemas/main.yang b/csit/variables/netconf/CRUD/schemas/main@2014-01-21.yang
similarity index 100%
rename from csit/variables/netconf/CRUD/schemas/main.yang
rename to csit/variables/netconf/CRUD/schemas/main@2014-01-21.yang