enable csv logging without internal-jtimon logging

[amohit1315]

Related Issue(s): #51

1. fix csv usage without log file in internal-jtimon
2. rename stateHandler to statsHandler

Tested config:

{
    "host": "10.53.97.126",
    "port": 50051,
    "user": "root",
    "cid": "test",
    "password": "Embe1mpls",
    "internal-jtimon": {
	"csv-log-file": "/root/test_jtimon/CC_TelemetrySensorData.csv"
    },
    "paths": [{
        "path": "/interfaces",
        "freq": 15000
    }],
    "log" : {
        "verbose": true,
	"file" : "/root/test_jtimon/log.txt"
    }
}

Dir contents:

ls -ltr
total 22960
-rw------- 1 root root      376 Oct 17 04:23 config.json
-rwx------ 1 root root 22589774 Oct 17 04:37 jtimon-linux-amd64
-rw------- 1 root root     7315 Oct 17 04:39 CC_TelemetrySensorData.csv
-rw------- 1 root root   903814 Oct 17 04:39 log.txt