Flaky p2p tests

[nkryuchkov]

for commit 122441979f58b86d950fd755ced57fb51c23fedf:

TestP2pNetwork_MessageValidation:

Case 1

        	Error Trace:	/Users/bloxmac/GolandProjects/ssv/network/p2p/p2p_validation_test.go:270
        	Error:      	Not equal: 
        	            	expected: 3
        	            	actual  : 0
        	Test:       	TestP2pNetwork_MessageValidation
        	Messages:   	node 0

Case 2

--- FAIL: TestP2pNetwork_MessageValidation (13.69s)
    p2p_validation_test.go:283: 
        	Error Trace:	/home/runner/work/ssv/ssv/network/p2p/p2p_validation_test.go:283
        	Error:      	invalid order
        	Test:       	TestP2pNetwork_MessageValidation
        	Messages:   	node 0, peers [{1 0} {2 -4839.971681614018} {3 -6759.6601793682175}]
FAIL

TestP2pNetwork_SubscribeBroadcast:

    p2p_test.go:132: 
        	Error Trace:	/Users/bloxmac/GolandProjects/ssv/network/p2p/p2p_test.go:132
        	Error:      	"0" is not greater than or equal to "2"
        	Test:       	TestP2pNetwork_SubscribeBroadcast
        	Messages:   	router 0
    p2p_test.go:132: 
        	Error Trace:	/Users/bloxmac/GolandProjects/ssv/network/p2p/p2p_test.go:132
        	Error:      	"0" is not greater than or equal to "2"
        	Test:       	TestP2pNetwork_SubscribeBroadcast
        	Messages:   	router 3