[RocksJava] Fix test failure of InfoLogLevelTest
[RocksJava] Fix test failure of InfoLogLevelTest

Summary:
In patch https://reviews.facebook.net/D47067, we change the
log level of the initial database information to header level.
As a result, even when the InfoLogLevel is set to Fatal, the
LOG file of a newly opened rocksdb instance will not be empty.
However, the current InfoLogLevelTest expect it should be empty.

This patch fixes this issue by enabling InfoLogLevelTest to
ignore the Log header.

Test Plan: make jtest

Reviewers: fyrz, anthony, IslamAbdelRahman, sdong, adamretter

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D47229

hobinyoon/rocksdb,SunguckLee/RocksDB,ryneli/rocksdb,kaschaeffer/rocksdb,tsheasha/rocksdb,geraldoandradee/rocksdb,tsheasha/rocksdb,bbiao/rocksdb,caijieming-baidu/rocksdb,ryneli/rocksdb,Vaisman/rocksdb,facebook/rocksdb,SunguckLee/RocksDB,flabby/rocksdb,jalexanderqed/rocksdb,hobinyoon/rocksdb,biddyweb/rocksdb,bbiao/rocksdb,vmx/rocksdb,wat-ze-hex/rocksdb,wat-ze-hex/rocksdb,caijieming-baidu/rocksdb,caijieming-baidu/rocksdb,OverlordQ/rocksdb,vmx/rocksdb,wenduo/rocksdb,SunguckLee/RocksDB,vmx/rocksdb,ryneli/rocksdb,jalexanderqed/rocksdb,vmx/rocksdb,bbiao/rocksdb,OverlordQ/rocksdb,ryneli/rocksdb,ryneli/rocksdb,SunguckLee/RocksDB,jalexanderqed/rocksdb,hobinyoon/rocksdb,geraldoandradee/rocksdb,facebook/rocksdb,hobinyoon/rocksdb,wenduo/rocksdb,ryneli/rocksdb,facebook/rocksdb,bbiao/rocksdb,luckywhu/rocksdb,luckywhu/rocksdb,Vaisman/rocksdb,biddyweb/rocksdb,OverlordQ/rocksdb,SunguckLee/RocksDB,RyanTech/rocksdb,vmx/rocksdb,bbiao/rocksdb,wenduo/rocksdb,OverlordQ/rocksdb,geraldoandradee/rocksdb,Andymic/rocksdb,jalexanderqed/rocksdb,biddyweb/rocksdb,tsheasha/rocksdb,biddyweb/rocksdb,Vaisman/rocksdb,luckywhu/rocksdb,luckywhu/rocksdb,facebook/rocksdb,norton/rocksdb,bbiao/rocksdb,tsheasha/rocksdb,Andymic/rocksdb,norton/rocksdb,RyanTech/rocksdb,geraldoandradee/rocksdb,OverlordQ/rocksdb,SunguckLee/RocksDB,caijieming-baidu/rocksdb,norton/rocksdb,RyanTech/rocksdb,vmx/rocksdb,kaschaeffer/rocksdb,wenduo/rocksdb,norton/rocksdb,RyanTech/rocksdb,wat-ze-hex/rocksdb,Andymic/rocksdb,Vaisman/rocksdb,kaschaeffer/rocksdb,wenduo/rocksdb,OverlordQ/rocksdb,flabby/rocksdb,RyanTech/rocksdb,kaschaeffer/rocksdb,hobinyoon/rocksdb,wat-ze-hex/rocksdb,caijieming-baidu/rocksdb,flabby/rocksdb,hobinyoon/rocksdb,bbiao/rocksdb,flabby/rocksdb,kaschaeffer/rocksdb,biddyweb/rocksdb,Andymic/rocksdb,Andymic/rocksdb,wenduo/rocksdb,Vaisman/rocksdb,biddyweb/rocksdb,wat-ze-hex/rocksdb,vmx/rocksdb,geraldoandradee/rocksdb,norton/rocksdb,flabby/rocksdb,OverlordQ/rocksdb,Andymic/rocksdb,tsheasha/rocksdb,tsheasha/rocksdb,luckywhu/rocksdb,facebook/rocksdb,bbiao/rocksdb,tsheasha/rocksdb,tsheasha/rocksdb,caijieming-baidu/rocksdb,Vaisman/rocksdb,wat-ze-hex/rocksdb,facebook/rocksdb,RyanTech/rocksdb,SunguckLee/RocksDB,kaschaeffer/rocksdb,wenduo/rocksdb,kaschaeffer/rocksdb,geraldoandradee/rocksdb,luckywhu/rocksdb,vmx/rocksdb,norton/rocksdb,jalexanderqed/rocksdb,hobinyoon/rocksdb,facebook/rocksdb,wat-ze-hex/rocksdb,geraldoandradee/rocksdb,caijieming-baidu/rocksdb,hobinyoon/rocksdb,Andymic/rocksdb,Andymic/rocksdb,wenduo/rocksdb,norton/rocksdb,facebook/rocksdb,jalexanderqed/rocksdb,RyanTech/rocksdb,Vaisman/rocksdb,biddyweb/rocksdb,wat-ze-hex/rocksdb,ryneli/rocksdb,norton/rocksdb,jalexanderqed/rocksdb,flabby/rocksdb,SunguckLee/RocksDB,flabby/rocksdb,luckywhu/rocksdb