Updated log message and throw error when unable to update the secret key file (#6542)

This PR fixes issue #6232 to update the error message and throw the error when updating key file is failed. This helps to find out the proper reason for failure, mainly with umask.

Author: harikrishna-patnala

framework/db/src/main/java/com/cloud/utils/crypt/EncryptionSecretKeyChanger.java

@@ -147,7 +147,7 @@ public static void main(String[] args) {
                     {
                         bwriter.write(newMSKey);
                     } catch (IOException e) {
-                        System.out.println("Failed to write new secret to file. Please update the file manually");
+                        System.out.println(String.format("Please update the file %s manually. Failed to write new secret to file with error %s", keyFile, e.getMessage()));
                     }
                 }
             }

setup/bindir/cloud-setup-databases.in

@@ -397,7 +397,11 @@ for example:
 
         def saveMgmtServerSecretKey():
             if self.encryptiontype == 'file':
-                open(self.encryptionKeyFile, 'w').write(self.mgmtsecretkey)
+                try:
+                    open(self.encryptionKeyFile, 'w').write(self.mgmtsecretkey)
+                except IOError as e:
+                    msg = "Failed to save management server secret key file %s due to %s, also please check the default umask"%(self.encryptionKeyFile, e.strerror)
+                    self.errorAndExit(msg)
 
         def formatEncryptResult(value):
             return 'ENC(%s)'%value