Keep http phrase in RemoteOperationResult as last chance for a detailed user message

# Conflicts:
#	src/com/owncloud/android/lib/common/operations/RemoteOperationResult.java
#	src/com/owncloud/android/lib/resources/files/ChunkedUploadRemoteFileOperation.java
#	src/com/owncloud/android/lib/resources/files/UploadRemoteFileOperation.java
#	src/com/owncloud/android/lib/resources/status/GetRemoteStatusOperation.java
#	src/com/owncloud/android/lib/resources/users/GetRemoteUserAvatarOperation.java
#	src/com/owncloud/android/lib/resources/users/RemoteGetUserQuotaOperation.java