Issue #1184 - Github connector now returns a full group list when no org is specified

fix bogus conformance failure due to time zones

this failed on my machine due to the unexported 'loc' field of the time
structure - it was nil in one and set to a ton of tiemzone data in the
other. instead let's just compare the unix timestamp value and zero it
out for the struct comparison.

Issue #1263 - Render error message provided by connector if user authentication failed

point users to storage/RBAC docs

allow it to disable CRD creation

add Refresh() to mock passwordConnector

 *: vendor golint to prevent upstream changes from breaking the build

golint has updated or dropped support for old Go versions several times,
causing breaks in our build. Vendor it locally to prevent this.

*: update go version

Add mention of `scopes` parameter in OIDC doc

Fix broken link to Bitbucket Cloud documentation

.travis.yml: fix golint import

Add Bitbucket connector

minor spelling correction

connector/saml: make unparsable (trailing, non-space/newline) data an error

Fixes #1304, if we want to be harsh.

However, I think if it was the user's intention to pass two certs, and
the second one couldn't be read, that shouldn't just disappear. After
all, when attempting to login later, that might fail because the
expected IdP cert data isn't there.
Signed-off-by: Stephan Renatus <srenatus@chef.io>