Disable all innodb_plugin tests on Solaris until the problem is resolved.

Track this via:
Bug#56063 InnoDB Plugin mysql-tests fail on Solaris

mysql-test/collections/default.experimental

@@ -12,6 +12,8 @@ funcs_1.ndb*                             # joro : NDB tests marked as experiment
 
 funcs_2.ndb_charset                      # joro : NDB tests marked as experimental as agreed with bochklin
 
+innodb_plugin.*  @solaris                # Bug#56063 InnoDB Plugin mysql-tests fail on Solaris
+
 main.ctype_gbk_binlog  @solaris          # Bug#46010: main.ctype_gbk_binlog fails sporadically : Table 't2' already exists
 main.func_str  @solaris                  # joro: Bug#40928
 main.plugin_load  @solaris               # Bug#42144