[FAB-3443] Improve clilogging output/usage description

This CR updates the log message for peer CLI calls to 'setlevel' to
clarify that it is using a regular expression to set the level for
multiple modules. It also updates the usage for both 'setlevel' and
'getlevel' commands. Hopefully this will help avoid confusion when
using 'getlevel', which does not currently use regular expressions
(but can be updated to do so in the future).

Change-Id: I30e7c8351dac3ed32fc19859f1f1981ccd9dc04c
Signed-off-by: Will Lahti <wtlahti@us.ibm.com>

peer/clilogging/getlevel.go

@@ -27,7 +27,7 @@ func getLevelCmd(cf *LoggingCmdFactory) *cobra.Command {
 	var loggingGetLevelCmd = &cobra.Command{
 		Use:   "getlevel <module>",
 		Short: "Returns the logging level of the requested module logger.",
-		Long:  `Returns the logging level of the requested module logger`,
+		Long:  `Returns the logging level of the requested module logger. Note: the module name should exactly match the name that is displayed in the logs.`,
 		RunE: func(cmd *cobra.Command, args []string) error {
 			return getLevel(cf, cmd, args)
 		},

peer/clilogging/setlevel.go

@@ -26,9 +26,9 @@ import (
 
 func setLevelCmd(cf *LoggingCmdFactory) *cobra.Command {
 	var loggingSetLevelCmd = &cobra.Command{
-		Use:   "setlevel <module> <log level>",
-		Short: "Sets the logging level of the requested module logger.",
-		Long:  `Sets the logging level of the requested module logger`,
+		Use:   "setlevel <module regular expression> <log level>",
+		Short: "Sets the logging level for all modules that match the regular expression.",
+		Long:  `Sets the logging level for all modules that match the regular expression.`,
 		RunE: func(cmd *cobra.Command, args []string) error {
 			return setLevel(cf, cmd, args)
 		},
@@ -49,7 +49,7 @@ func setLevel(cf *LoggingCmdFactory, cmd *cobra.Command, args []string) (err err
 		if err != nil {
 			return err
 		}
-		logger.Infof("Log level set for peer module '%s': %s", logResponse.LogModule, logResponse.LogLevel)
+		logger.Infof("Log level set for peer modules matching regular expression '%s': %s", logResponse.LogModule, logResponse.LogLevel)
 	}
 	return err
 }