Resolve memory addresses in log messages

[bertinatto]

Fixes #74.

/kind bug
/assign @leakingtapan

[coveralls]

Pull Request Test Coverage Report for Build 203

• 2 of 17 (11.76%) changed or added relevant lines in 3 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.1%) to 51.167%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pkg/driver/identity.go	0	3	0.0%
pkg/driver/controller.go	2	8	25.0%
pkg/driver/node.go	0	6	0.0%

Totals
Change from base Build 200:	-0.1%
Covered Lines:	570
Relevant Lines:	1114

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💛 - Coveralls

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: bertinatto

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[leakingtapan]

Do we have sample output to take a look?

[bertinatto]

Sample line:

I1203 10:11:11.681529       1 controller.go:32] CreateVolume: called with args {Name:pvc-bad5f951-f6e3-11e8-a3bb-0ecf646fefd0 CapacityRange:required_bytes:4294967296  VolumeCapabilities:[mount:<fs_type:"ext4" mount_flags:"noexec" > access_mode:<mode:SINGLE_NODE_WRITER > ] Parameters:map[fsType:ext4] Secrets:map[] VolumeContentSource:<nil> AccessibilityRequirements:requisite:<segments:<key:"topology.ebs.csi.aws.com/zone" value:"us-east-1d" > > preferred:<segments:<key:"topology.ebs.csi.aws.com/zone" value:"us-east-1d" > >  XXX_NoUnkeyedLiteral:{} XXX_unrecognized:[] XXX_sizecache:0}

[leakingtapan]

/lgtm

[leakingtapan]

The drop is caused by extra lines of glog added.