Update git submodules

Update git submodules

* Update docs/submodules/aaa from branch 'master'
  to a8f0541c2e249f1027339dfddf99a5544a848abf
  - Merge changes I6062ddfa,If91c0ea5,Idd92e1be,I224e0fb7,Iab290548, ...

    * changes:
      Enable findbugs in aaa-parent
       Fix findbugs violations in aaa-cli
      Fix findbugs violations in aaa-filterchain
      Fix findbugs violations in aaa-shiro
      Fix findbugs violations in aaa-cert
      Fix findbugs violations in aaa-encrypt-service

  - Enable findbugs in aaa-parent

    Change-Id: I6062ddfa44de6cba7540beea5fbb8d215d3ca2d1
    Signed-off-by: Tom Pantelis <tompantelis@gmail.com>
  -  Fix findbugs violations in aaa-cli

    - Method may fail to close stream
    - Reliance on default encoding
    - Incorrect lazy initialization of static field
    - Unread field: should this field be static?
    - Write to static field from instance method

    Change-Id: If91c0ea5997490468d030cab3aead2825fbe9c9e
    Signed-off-by: Tom Pantelis <tompantelis@gmail.com>
  - Fix findbugs violations in aaa-filterchain

    - May expose internal representation by returning reference to mutable object
    - Inefficient use of keySet iterator instead of entrySet iterator
    - Field not initialized in constructor but dereferenced without null check

    Change-Id: Idd92e1beb6998a6968ae6be3b5f1e83ae1ca50d7
    Signed-off-by: Tom Pantelis <tompantelis@gmail.com>
  - Fix findbugs violations in aaa-shiro

    - Possible null pointer dereference
    - Class names shouldn't shadow simple name of implemented interface
    - Method may fail to close database resource
    - Non-transient non-serializable instance field in serializable class
    - Non-serializable class has a serializable inner class
    - Class is Serializable, but doesn't define serialVersionUID
    - Consider using Locale parameterized version of invoked method
    - Reliance on default encoding
    - May expose internal representation by returning reference to mutable object
    - Method invokes toString() method on a String
    - Private method is never called
    - Unread field
    - Nonconstant string passed to execute or addBatch method on an SQL statement
    - Unchecked/unconfirmed cast
    - Dead store to local variable
    - Class implements same interface as superclass
    - Redundant nullcheck of value known to be non-null
    - Exception is caught when Exception is not thrown
    - Useless control flow

    Change-Id: I224e0fb71f3570f69fa1963e89b8c687a464156a
    Signed-off-by: Tom Pantelis <tompantelis@gmail.com>
  - Fix findbugs violations in aaa-cert

    - Null pointer dereference
    - Method ignores exceptional return value
    - Method ignores results of InputStream.read()
    - Method may fail to clean up stream or resource
    - Method may fail to close stream on exception
    - Reliance on default encoding
    - Consider returning a zero length array rather than null
    - Redundant nullcheck of value known to be non-null
    - Potentially dangerous use of non-short-circuit logic

    Change-Id: Iab2905488bbe2d4b9be3e92c69e49e5eb0129958
    Signed-off-by: Tom Pantelis <tompantelis@gmail.com>
  - Fix findbugs violations in aaa-encrypt-service

    - Method may fail to clean up stream or resource
    - Reliance on default encoding
    - Method invokes inefficient new String(String) constructor
    - Unchecked/unconfirmed cast

    Change-Id: I0dd13b306a684167bacdf94648369150f365d590
    Signed-off-by: Tom Pantelis <tompantelis@gmail.com>