Make OperationTimeoutTestCase more robust by increasing timeout for setup/teardown ops

org.jboss.as.test.integration.management.util.MgmtOperationException: Management operation failed.
    at org.jboss.as.test.integration.domain.management.util.DomainTestUtils.executeForResult(DomainTestUtils.java:160)
    at org.jboss.as.test.integration.domain.OperationTimeoutTestCase.executeForResult(OperationTimeoutTestCase.java:306)
    at org.jboss.as.test.integration.domain.OperationTimeoutTestCase.tearDownDomain(OperationTimeoutTestCase.java:192)
------- Stdout: -------
[Host Controller] &amp#27;[31m&amp#27;[0m&amp#27;[0m13:42:23,027 INFO  [org.jboss.as.controller.management-operation] (Host Controller Service Threads - 5) WFLYCTL0409: Execution of operation 'remove' on remote process at address '[&amp#27;[0m
[Host Controller]     ("host" => "slave"),
[Host Controller]     ("server" => "other-two")
[Host Controller] ]' timed out after 2000 ms while awaiting initial response; remote process has been notified to terminate operation
[Server:other-two] 13:42:23,033 INFO  [org.jboss.as.test.integration.management.extension.blocker.BlockerExtension] (ServerService Thread Pool -- 12) Registered blocker-test operations
[Server:main-three] 13:42:23,034 INFO  [org.jboss.as.test.integration.management.extension.blocker.BlockerExtension] (ServerService Thread Pool -- 4) Registered blocker-test operations
[Server:main-one] 13:42:23,034 INFO  [org.jboss.as.test.integration.management.extension.blocker.BlockerExtension] (ServerService Thread Pool -- 7) Registered blocker-test operations
[Server:other-two] 13:42:23,034 INFO  [org.jboss.as.protocol] (ServerService Thread Pool -- 2) WFLYPRT0057:  cancelled task by interrupting thread Thread[ServerService Thread Pool -- 12,5,ServerService ThreadGroup]
[Host Controller] &amp#27;[0m&amp#27;[0m13:42:23,042 INFO  [org.jboss.as.test.integration.management.extension.blocker.BlockerExtension] (Host Controller Service Threads - 9) Registered blocker-test operations&amp#27;[0m
[Host Controller] &amp#27;[0m&amp#27;[0m13:42:23,045 INFO  [org.jboss.as.test.integration.management.extension.blocker.BlockerExtension] (management-handler-thread - 2) Registered blocker-test operations&amp#27;[0m
Failed operation:
{
    "operation" => "remove",
    "address" => [("extension" => "org.wildfly.extension.blocker-test")]
}
Response:
{
    "outcome" => "failed",
    "result" => undefined,
    "failure-description" => "WFLYDC0022: Operation failed or was rolled back on all servers.",
    "rolled-back" => true,
    "server-groups" => {
        "main-server-group" => {"host" => {
            "master" => {"main-one" => {"response" => {
                "outcome" => "failed",
                "rolled-back" => true
            }}},
            "slave" => {"main-three" => {"response" => {
                "outcome" => "failed",
                "result" => undefined,
                "rolled-back" => true
            }}}
        }},
        "other-server-group" => {"host" => {"slave" => {"other-two" => {"response" => {
            "outcome" => "failed",
            "result" => undefined,
            "failure-description" => "WFLYCTL0409: Execution of operation 'remove' on remote process at address '[
    (\"host\" => \"slave\"),
    (\"server\" => \"other-two\")
]' timed out after 2000 ms while awaiting initial response; remote process has been notified to terminate operation",
            "rolled-back" => true
        }}}}}
    }
}