agent: Avoid sudo, renew certificates assuming root (#2697)

In some environments running the keystore cert renewal (as root user)
over an already connected agent connection may cause exception
such as: `sudo: sorry, you must have a tty to run sudo`. Since, all
agents - KVM, CPVM and SSVM run as root user, we don't need to run
the renewal scripts with sudo.

Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>

Author: yadvr

agent/src/com/cloud/agent/Agent.java

@@ -728,7 +728,7 @@ public Answer setupAgentKeystore(final SetupKeyStoreCommand cmd) {
             _shell.setPersistentProperty(null, KeyStoreUtils.KS_PASSPHRASE_PROPERTY, storedPassword);
         }
 
-        Script script = new Script(true, _keystoreSetupPath, 60000, s_logger);
+        Script script = new Script(_keystoreSetupPath, 60000, s_logger);
         script.add(agentFile.getAbsolutePath());
         script.add(keyStoreFile);
         script.add(storedPassword);
@@ -772,7 +772,7 @@ private Answer setupAgentCertificate(final SetupCertificateCommand cmd) {
             throw new CloudRuntimeException("Unable to save received agent client and ca certificates", e);
         }
 
-        Script script = new Script(true, _keystoreCertImportPath, 60000, s_logger);
+        Script script = new Script(_keystoreCertImportPath, 60000, s_logger);
         script.add(agentFile.getAbsolutePath());
         script.add(keyStoreFile);
         script.add(KeyStoreUtils.AGENT_MODE);