JMX rules should be deprecated

[fmbenhassine]

One of the motivation of JMX feature is to be able to reconfigure rules at runtime. Unfortunately, it turns out that this feature has introduced a couple of issues in Easy Rules:

• Since the core module should be android compatible (and since android does not support JMX), it's impossible to add this feature in the core module in a consistent and transparent way
• Adding JMX feature in a separate module leads to an inconsistency in rules engines: DeafultRulesEngine and DefaultJmxRulesEngine (see issue newbie - however API feels inconsistent - would some refactoring improve consistency? #31).

As a result, until finding a clean way to add this feature in a consistent way that is android compatible, JMX rules should be deprecated in v2.3 and removed in v2.4