Actualize scala cache affinity examples.

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STEPS FOR REPRODUCE
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1. Run 4 cache nodes (for example, 2 from command line, and 2 from Idea IDE)
2. Run ScalarCacheAffinityExample1
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ACTUAL RESULT
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There are unexpected "null" values printed on the example's IDE node:
"
>>> Storing keys in cache: List(A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z)
>>> Executing affinity job for key: E
>>> Executing affinity job for key: J
>>> Executing affinity job for key: O
>>> Executing affinity job for key: T
>>> Executing affinity job for key: Y
>>> Affinity job result for key 'E': null
>>> Affinity job result for key 'X': null
>>> Affinity job result for key 'N': n
>>> Affinity job result for key 'T': t
>>> Affinity job result for key 'Y': null
>>> Affinity job result for key 'J': j
>>> Affinity job result for key 'U': null
>>> Affinity job result for key 'F': f
>>> Affinity job result for key 'A': null
>>> Affinity job result for key 'M': null
>>> Affinity job result for key 'I': null
>>> Affinity job result for key 'G': null
>>> Affinity job result for key 'V': null
>>> Affinity job result for key 'Q': q
>>> Affinity job result for key 'L': l
>>> Affinity job result for key 'B': b
>>> Affinity job result for key 'P': p
>>> Affinity job result for key 'C': null
>>> Affinity job result for key 'H': h
>>> Affinity job result for key 'W': null
>>> Affinity job result for key 'K': k
>>> Affinity job result for key 'R': null
>>> Affinity job result for key 'O': null
>>> Affinity job result for key 'D': null
>>> Affinity job result for key 'Z': z
>>> Affinity job result for key 'S': null
"
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EXPECTED RESULT
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"null" shouldn't be printed as results on any nodes:

"
>>> Storing keys in cache: List(A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z)
>>> Executing affinity job for key: E
>>> Executing affinity job for key: J
>>> Executing affinity job for key: O
>>> Executing affinity job for key: T
>>> Executing affinity job for key: Y
>>> Affinity job result for key 'E': e
>>> Affinity job result for key 'X': x
>>> Affinity job result for key 'N': n
>>> Affinity job result for key 'T': t
>>> Affinity job result for key 'Y': y
>>> Affinity job result for key 'J': j
>>> Affinity job result for key 'U': u
>>> Affinity job result for key 'F': f
>>> Affinity job result for key 'A': a
>>> Affinity job result for key 'M': m
>>> Affinity job result for key 'I': i
>>> Affinity job result for key 'G': g
>>> Affinity job result for key 'V': v
>>> Affinity job result for key 'Q': q
>>> Affinity job result for key 'L': l
>>> Affinity job result for key 'B': b
>>> Affinity job result for key 'P': p
>>> Affinity job result for key 'C': c
>>> Affinity job result for key 'H': h
>>> Affinity job result for key 'W': w
>>> Affinity job result for key 'K': k
>>> Affinity job result for key 'R': r
>>> Affinity job result for key 'O': o
>>> Affinity job result for key 'D': d
>>> Affinity job result for key 'Z': z
>>> Affinity job result for key 'S': s
"
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ADDITIONAL INFO
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1) Is NOT reproducible in cases one cache node is started and no one cache node is started
2) Is NOT reproducible for GG 6.6.3-p1 (ver. 6.6.3-p1-ent#20150228-sha1:ece6cbbd)