Externalize Secure Agent configurations so that those can be persisted and re-use

• Add instructions on how to mount various configurations for Secure Agent so those can be re-used.
• Updated README.md with descriptions on how to mount volumes.
• Documented various ports in Secure Agents.
• Fixed punctuations.

@ERIC.SCHOVILLE @JARED.KOSANOVIC

conf/agentcore.cfg

+# Number of seconds to refresh the rmi info file of the AgentCore's rmi server.
+rmi-info-refresh-period=300
+
+# Number of seconds that the Agent Core waits for the Agent Manager's notification that it is shuting down so the Agent Core can continue it's process (e.g. upgrade).
+resource-release-waiting-time=10
+
+# Number of seconds to check for new upgrade in the server.
+upgrade-check-period=600
+
+# Number of seconds to update connectivity status and other agent core status
+maintenance-check-period=10
+
+# Number of seconds for timeout of http connection with Informatica cloud
+http-connection-timeout=30
+
+# Number of seconds for timeout of http socket with Informatica cloud
+http-socket-timeout=30
+
+# Number of total seconds for retry when getting application specification from Informatica cloud
+appspec-retry-timeout=300
+
+# Number of seconds between each retry getting application specification from Informatica cloud
+appspec-retry-interval=5
+
+# Enable TLS certificate generation
+enable-application-certificate-generation=true