[SPARK-11236] [TEST-MAVEN] [TEST-HADOOP1.0] [CORE] Update Tachyon dependency 0.7.1 -> 0.8.1

This is a reopening of #9204 which failed hadoop1 sbt tests.

With the original PR, a classpath issue would occur due to the MIMA plugin pulling in hadoop-2.2 dependencies regardless of the hadoop version when building the `oldDeps` project. These affect the hadoop1 sbt build because they are placed in `lib_managed` and Tachyon 0.8.0's default hadoop version is 2.2.

Author: Calvin Jia <jia.calvin@gmail.com>

Closes #9395 from calvinjia/spark-11236.