release API spec resources when reload APIs (TykTechnologies#2616)

this PR just brings back this change: https://github.com/TykTechnologies/tyk/pull/2256/files#diff-ad28d87199f22b3b034c7fc355476a6dR672

also, we need re-enable this test if we want to make sure no leaks happening (connected with CB logic): https://github.com/TykTechnologies/tyk/blob/master/gateway/gateway_test.go#L831

(cherry picked from commit f0cd621)

Make key level tags in order and unique (TykTechnologies#2475)

Fixes TykTechnologies/tyk-analytics#1413

FE task: TykTechnologies/tyk-analytics-ui#1082

(cherry picked from commit f2f74d9)

Fix formatting of complex error messages (TykTechnologies#2449)

It was using html/template package for rendering JSON files
which was causing HTML based escaping, instead of JS based.
For example quotes was escaped as `&TykTechnologies#34;` instead of `\"`

Fix TykTechnologies#2448

Handle quota reset for RPC key upadates

Fix TykTechnologies#2327

RPMs can be signed via the agent (TykTechnologies#2343)

This will enable us to use the official go 1.12 base image rather than having to setup go by hand on jessie.

Bump version

Bump version

Add Host field to AnalyticsRecord (TykTechnologies#2190)

Fix Basic Auth body extraction (TykTechnologies#2188)

Since body extraction used as fallback, previous Www-Authenticate header should be removed

Fix TykTechnologies#1855 (comment)

Bump version