Add indexes to foreign keys where appropriate

create index IDX_MODDEF_PROCDEF on JBPM_MODULEDEFINITION (PROCESSDEFINITION_);
create index IDX_MODINST_PRCINST on JBPM_MODULEINSTANCE (PROCESSINSTANCE_);
create index IDX_NODE_ACTION on JBPM_NODE (ACTION_);
create index IDX_PROCIN_ROOTTKN on JBPM_PROCESSINSTANCE (ROOTTOKEN_);
create index IDX_TASK_TASKNODE on JBPM_TASK (TASKNODE_);
create index IDX_TSK_TSKCTRL on JBPM_TASK (TASKCONTROLLER_);
create index IDX_TASK_TASKMGTDEF on JBPM_TASK (TASKMGMTDEFINITION_);
create index IDX_TASKINST_TASK on JBPM_TASKINSTANCE (TASK_, TOKEN_);
create index IDX_TASKINST_TMINST on JBPM_TASKINSTANCE (TASKMGMTINSTANCE_);
create index IDX_TOKEN_NODE on JBPM_TOKEN (NODE_);
create index IDX_TOKEN_PROCINST on JBPM_TOKEN (PROCESSINSTANCE_);
create index IDX_TOKEN_PARENT on JBPM_TOKEN (PARENT_);
create index IDX_TKVARMAP_CTXT on JBPM_TOKENVARIABLEMAP (CONTEXTINSTANCE_);
create index IDX_TKVARMAP_TOKEN on JBPM_TOKENVARIABLEMAP (TOKEN_);
create index IDX_VARINST_TKVARMP on JBPM_VARIABLEINSTANCE (TOKENVARIABLEMAP_);
create index IDX_VARINST_PRCINST on JBPM_VARIABLEINSTANCE (PROCESSINSTANCE_);
create index IDX_VARINST_TK on JBPM_VARIABLEINSTANCE (TOKEN_);