master: Fix bug in renaming matedata backup files

There was a bug in function renaming metadata backup files
which caused all copies to be overwritten with the oldest one.
This commit fixes it.

Change-Id: If72653cf6bce8873dce02c8192608e0179da0261
common: Add checking size of deserialized data

This commit introduces checking the maximum amount of deserialized data.
The limits are:
 * 1M elements of vector and string;
 * 32MiB of full packet or single deserialization call.

Change-Id: I0e1601ec695863435dc3384ee51ae4b677798f3c
utils: Add alternative wireshark plugin path in README

On some versions of linux (e.g. Ubuntu 13.10) there's an another path to
store wireshark plugins. This commit introduce this information in
wireshark README file.

Change-Id: I4f2fa0458db66a8cb7f2f41039ef7c50dceb19f3
tests: Divide SystemTestingSuite tests to Short/LongSystemTests

Existing tests division between sanity tests and other ones wasn't good enough.
Difficulties appeared when we wanted to check a major set of LizardFS features
but long tests would last too long (e.g. testing big changes just before
merging). This commit splits tests into two groups: "short" when each test
lasts up to ~5 minutes, "long" otherwise.

Change-Id: I7d2f1d41bdf52ae8f5d5d4f32c0fd5bc84fac8d3
master: Calculate fsnodes' checksums

To ensure metadata integrity when delegating dump to metarestore,
fsnodes' checksum is checked.

Change-Id: I7d17a50ee04d41e6c498218a5af93cb3114c09e0
master: Calculate fsedges' checksums

To ensure metadata integrity when delegating dump to metarestore,
fsedges' checksum is checked.

Change-Id: I585bee76909a737f80159225a412d26caddd2ca8