fix issue #5

[luyiisme]

Motivation:

fix issue #5

Modification:

• upgrade the client version to 1.4.1;
• lookout-ext-os degrade the level of warning logs;
• add metrics which record data report result status ;

Result:

Fixes #5

[coveralls]

Pull Request Test Coverage Report for Build 15

• 52 of 135 (38.52%) changed or added relevant lines in 11 files are covered.
• 3 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+1.7%) to 67.049%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
client/lookout-ext-os/src/main/java/com/alipay/lookout/os/linux/SystemLoadMetricsImporter.java	0	1	0.0%
client/lookout-ext-os/src/main/java/com/alipay/lookout/os/linux/DiskUsageMetricsImporter.java	0	1	0.0%
client/lookout-reg-server/src/main/java/com/alipay/lookout/remote/report/SchedulerPoller.java	0	1	0.0%
client/lookout-ext-os/src/main/java/com/alipay/lookout/os/linux/NetTrafficMetricsImporter.java	0	1	0.0%
client/lookout-ext-os/src/main/java/com/alipay/lookout/os/linux/CpuUsageMetricsImporter.java	0	2	0.0%
client/lookout-ext-os/src/main/java/com/alipay/lookout/os/linux/IOStatsMetricsImporter.java	0	4	0.0%
client/lookout-reg-server/src/main/java/com/alipay/lookout/remote/report/HttpObserver.java	22	48	45.83%
client/lookout-reg-server/src/main/java/com/alipay/lookout/remote/report/support/http/DefaultHttpRequestProcessor.java	26	73	35.62%

Files with Coverage Reduction	New Missed Lines	%
client/lookout-reg-server/src/main/java/com/alipay/lookout/remote/report/HttpObserver.java	3	63.77%

Totals
Change from base Build 9:	1.7%
Covered Lines:	1990
Relevant Lines:	2968

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💛 - Coveralls