Improved detecting and reporting errors on storage locations.

- Introduced InvalidStorageLocationError for reporting unavailable
  or invalid storage locations.
- Introduced MissingPlatformRequirementsError for reporting cases
  where all valid storage locations are found unavailable.
- Added test modules for unavailable and invalid storage locations.
- Added error precedence mapping for improving error reporting.
- Patch operations in jsondb backend now return the error with the
  highest precedence in case of multiple errors are detected.
- Tuned existing test case for error code precedence mapping.
- Enabled fetching from multiple storage locations in one request.

Change-Id: I858f6c50a5c67f53b78de09471f152b49ed4b1bf
Reviewed-by: Cristiano di Flora <cristiano.di-flora@nokia.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/src/contacts/qcontactmanager.h b/src/contacts/qcontactmanager.h
index facae0b71..359a6b7db 100644
--- a/src/contacts/qcontactmanager.h
+++ b/src/contacts/qcontactmanager.h
@@ -110,7 +110,9 @@ public:
         VersionMismatchError,
         LimitReachedError,
         InvalidContactTypeError,
-        TimeoutError
+        TimeoutError,
+        InvalidStorageLocationError,
+        MissingPlatformRequirementsError
     };
 
     /* Error reporting */