Synchronized and FastList usage rework

[yulianoifa-mobius]

Hi
Currently there is lot of synchronized code blocks due to FastList usage for pending requests for reconnect and enquire link.
In case on thread blocks inside one of the segments everything is actually stops responding.
In order to improve it java.util.concurrent classes may be used. This will improve perfomance and minimize damage from blocking...

[nhanth87]

we have target problem of zd 34491 is from schedule of enquireLink/Connect.
enquireLink should be sent in parallel instead of blocking

[nhanth87]

consider that if multiple esmes bound to one ip/port then only one enquireLink is sent

[nhanth87]

note that if we increase connectionTimeout then only CR is scheduled, nothing for enquireLink