FAST: Do not apply snapshot until every incremental message is received
FAST: Do not apply snapshot until every incremental message is received

Consider an example: we receive a snapshot message with
LastMsgSeqNumProcessed equal to 100 but so far we apply
incremental messages in a range 90-95 i.e. we have not
received incremental messages 96-100. In such a case
we should wait until 96-100 are applied.

Signed-off-by: Marat Stanichenko <146c4a279a7427b2cc19a19b6130cbb7ee404ab1@gmail.com>
Signed-off-by: Pekka Enberg <add4fcd06328a394f0ad91feda7ee057316dc5ed@kernel.org>

penberg/libtrading,divaykin/libtrading,etoestja/libtrading,femtotrader/libtrading,mstanichenko/libtrading,etoestja/libtrading,mstanichenko/libtrading,libtrading/libtrading,fengzhyuan/libtrading,NunoEdgarGub1/libtrading,NunoEdgarGub1/libtrading,divaykin/libtrading,svdev/libtrading,penberg/libtrading,femtotrader/libtrading,Bitcoinsulting/libtrading,svdev/libtrading,jvirtanen/libtrading,fengzhyuan/libtrading,libtrading/libtrading,jvirtanen/libtrading,Bitcoinsulting/libtrading