removed unused class
 ramework/db/src/com/cloud/utils/db/TransactionContextInterceptor.java
CLOUDSTACK-7436: Fix automation test on RvR status detection

Everytime when checking the RvR status, you must wait some time for RvR to
update it's status. The polling thread would update the status only every 30
seconds by default.
CLOUDSTACK-7574, CREATE TABLE cloud.baremetal_rct
remove table baremetal_rct crate from schema-440to441.sql,already in schema-441to450.sql
throw timeout exception when lock acquire times out