analysis.lami: Introduce LAMI integration plugins

analysis.lami: Introduce LAMI integration plugins

The LAMI (LTTng-Analyses Machine Interface) specification [1]
defines a protocol for external scripts to receive commands and
return results. As its name implies, this is what LTTng-Analyses
will use.

This integration however should be generic to the protocol and
not specific to LTTng.

[1] https://github.com/lttng/lami-spec

Change-Id: I0c5399bf70a288ebdcf5ab96ce31f5765b8aecb4
Signed-off-by: Alexandre Montplaisir <alexmonthy@efficios.com>
Reviewed-on: https://git.eclipse.org/r/71564
Reviewed-by: Hudson CI
Reviewed-by: Patrick Tasse <patrick.tasse@gmail.com>
Tested-by: Patrick Tasse <patrick.tasse@gmail.com>