Remove redundant m_connections from ClientInterface.
Remove redundant m_connections from ClientInterface.

m_cihm is the new thing.

kumarrus/voltdb,simonzhangsm/voltdb,ingted/voltdb,VoltDB/voltdb,VoltDB/voltdb,ingted/voltdb,migue/voltdb,ingted/voltdb,deerwalk/voltdb,paulmartel/voltdb,simonzhangsm/voltdb,zuowang/voltdb,kumarrus/voltdb,zuowang/voltdb,paulmartel/voltdb,deerwalk/voltdb,wolffcm/voltdb,zuowang/voltdb,flybird119/voltdb,simonzhangsm/voltdb,VoltDB/voltdb,wolffcm/voltdb,zuowang/voltdb,creative-quant/voltdb,ingted/voltdb,creative-quant/voltdb,kumarrus/voltdb,flybird119/voltdb,kumarrus/voltdb,kumarrus/voltdb,paulmartel/voltdb,flybird119/voltdb,simonzhangsm/voltdb,paulmartel/voltdb,VoltDB/voltdb,deerwalk/voltdb,paulmartel/voltdb,deerwalk/voltdb,zuowang/voltdb,migue/voltdb,wolffcm/voltdb,migue/voltdb,creative-quant/voltdb,simonzhangsm/voltdb,VoltDB/voltdb,ingted/voltdb,migue/voltdb,VoltDB/voltdb,simonzhangsm/voltdb,kumarrus/voltdb,kumarrus/voltdb,paulmartel/voltdb,deerwalk/voltdb,simonzhangsm/voltdb,migue/voltdb,deerwalk/voltdb,zuowang/voltdb,simonzhangsm/voltdb,migue/voltdb,zuowang/voltdb,ingted/voltdb,flybird119/voltdb,creative-quant/voltdb,migue/voltdb,zuowang/voltdb,VoltDB/voltdb,paulmartel/voltdb,flybird119/voltdb,migue/voltdb,creative-quant/voltdb,ingted/voltdb,wolffcm/voltdb,deerwalk/voltdb,wolffcm/voltdb,deerwalk/voltdb,creative-quant/voltdb,wolffcm/voltdb,flybird119/voltdb,creative-quant/voltdb,flybird119/voltdb,kumarrus/voltdb,creative-quant/voltdb,wolffcm/voltdb,flybird119/voltdb,ingted/voltdb,wolffcm/voltdb,paulmartel/voltdb