Tip for extracting self self signed cert for use with curl

[Kevin Minder <ke...@hortonworks.com>]

keytool -exportcert -rfc -alias gateway-identity -keystore 
data/security/keystores/gateway.jks -rfc -file gateway.pem

# You can either provide the master password when prompted or just hit 
return and ignore the resulting warning.

curl -u guest:guest-password --cacert gateway.pem 
https://localhost:8443/gateway/sandbox/webhdfs/v1/?op=LISTSTATUS

# Note the -k is not required.

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