[branch-1] remove thrift examples out of hbase-examples module for bypassing the thrift version check

[ERROR] Failed to execute goal on project hbase-examples: Could not resolve dependencies for project org.apache.hbase:hbase-examples:jar:1.7.0: Could not find artifact org.apache.hbase:hbase-thrift:jar:1.7.0 in apache release (https://repository.apache.org/content/repositories/releases/) -> [Help 1]

This is the msg when I tried to run make_rc.sh, we need to remove thrift related codes from hbase-examples for making release successfully.