renamed HeadPipeline to OldHeadPipeline and marked as deprecated

.../examples/experiment09/MethodCallThroughputAnalysis9.java

...examples/experiment10/MethodCallThroughputAnalysis10.java

...examples/experiment11/MethodCallThroughputAnalysis11.java

...examples/experiment14/MethodCallThroughputAnalysis14.java

...examples/experiment15/MethodCallThroughputAnalysis15.java

...examples/experiment16/MethodCallThroughputAnalysis16.java

...examples/experiment17/MethodCallThroughputAnalysis17.java

...examples/experiment19/MethodCallThroughputAnalysis19.java

...rformancetest/java/teetime/framework/OldHeadPipeline.java

src/performancetest/java/teetime/framework/OldPipeline.java