bump loggregator

eda5215 bump loggregatorlib
17f8387 Add component tag to value metrics emitted to varz
90673a6 Remove incorrect message about syslog sinks never finishing
62691b3 Fix usage of new MetricValue
d707e0e Bump dropsonde [#74358804]
7a2c074 Use MetricValue with units
022dfca Forward value metric messages to varz
5a6a548 Unmarshal/marshal dropsonde messages in metron pipeline